professional knowledge
Does the quality of air affect skin condition?
Air quality can significantly impact skin health. While many women prioritize skincare, they often overlook everyday factors like scented candles, incense sticks, and air pollution, which can be "invisible killers" that accelerate skin aging.
Air pollution can harm your skin, including:
• Oxidative stress: Pollutants (such as ozone and PAHs) can produce reactive oxygen species (ROS) in the skin, damaging lipids, DNA and proteins, leading to premature skin aging.
• Accelerated wrinkles and pigmentation: Collagen and elastin are damaged, skin firmness decreases, and fine lines and spots appear.
• Chronic skin problems: such as atopic dermatitis, acne, and psoriasis, which may be exacerbated by pollution.
• Increased risk of skin cancer: Long-term exposure to pollutants (such as polycyclic aromatic hydrocarbons) may increase the risk of cancer.
Pollutants released by fragrance products:
• Fine suspended particulate matter (PM2.5): easily adheres to the skin surface, clogs pores, and causes dullness and acne.
• Volatile organic compounds (VOCs): such as formaldehyde, benzene, and phthalates, which irritate the skin and cause dryness and allergies.
• Smoke and aroma particles: can cause oxidative damage and allergic reactions.
How to protect your skin and improve air quality?
1. Open windows for ventilation: promote fresh air circulation and reduce the accumulation of indoor pollutants.
2. Use a medical-grade air purifier:
o We recommend using an air purification device from Yishun Technology that has a HEPA H14 filter, UV-C germicidal lamp, and activated carbon deodorization function.
o Can effectively filter PM2.5, bacteria, VOC and other substances harmful to the skin.
3. Choose natural fragrance products:
o Avoid products with excessive chemical fragrances.
o Give priority to air fresheners that are clearly labeled, non-toxic and natural.
Air pollution can harm your skin, including:
• Oxidative stress: Pollutants (such as ozone and PAHs) can produce reactive oxygen species (ROS) in the skin, damaging lipids, DNA and proteins, leading to premature skin aging.
• Accelerated wrinkles and pigmentation: Collagen and elastin are damaged, skin firmness decreases, and fine lines and spots appear.
• Chronic skin problems: such as atopic dermatitis, acne, and psoriasis, which may be exacerbated by pollution.
• Increased risk of skin cancer: Long-term exposure to pollutants (such as polycyclic aromatic hydrocarbons) may increase the risk of cancer.
Pollutants released by fragrance products:
• Fine suspended particulate matter (PM2.5): easily adheres to the skin surface, clogs pores, and causes dullness and acne.
• Volatile organic compounds (VOCs): such as formaldehyde, benzene, and phthalates, which irritate the skin and cause dryness and allergies.
• Smoke and aroma particles: can cause oxidative damage and allergic reactions.
How to protect your skin and improve air quality?
1. Open windows for ventilation: promote fresh air circulation and reduce the accumulation of indoor pollutants.
2. Use a medical-grade air purifier:
o We recommend using an air purification device from Yishun Technology that has a HEPA H14 filter, UV-C germicidal lamp, and activated carbon deodorization function.
o Can effectively filter PM2.5, bacteria, VOC and other substances harmful to the skin.
3. Choose natural fragrance products:
o Avoid products with excessive chemical fragrances.
o Give priority to air fresheners that are clearly labeled, non-toxic and natural.
Does using an air fryer affect indoor air quality?
There will be an impact, but less than traditional frying methods.
Due to its closed heating structure and low oil usage, air fryers release significantly less fine particulate matter (PM2.5) and volatile organic compounds (VOCs) during the cooking process than traditional deep-frying or stir-frying, helping to maintain better indoor air quality.
Reasons why air fryers have lower air pollution:
Low emissions: Air fryers emit significantly lower levels of PM and VOC than frying.
Sealed heating system: can effectively seal oil smoke and pollutants and reduce escape.
Reduced odor diffusion: Even when using high-fat ingredients, there is less odor and aerosol.
Sources of pollution that still require attention:
PM2.5 / PM10 suspended particulate matter: High-temperature grease or uncleaned frying basket will release PM2.5 / PM10.
VOC (Volatile Organic Compounds): such as acrolein and formaldehyde, which are produced when the temperature is too high.
Cooking odors and aerosols: Foods such as fish and spices still release some odor.
Safety Tips:
When using, ventilation should be improved, such as moving near a window or turning on a range hood.
Continue to ventilate for 10–15 minutes after cooking to disperse any remaining contamination.
Clean the frying basket and the machine body regularly to avoid carbonization of residue and smoke.
Avoid high-temperature frying and keep the oil below its smoke point to reduce pollution.
Due to its closed heating structure and low oil usage, air fryers release significantly less fine particulate matter (PM2.5) and volatile organic compounds (VOCs) during the cooking process than traditional deep-frying or stir-frying, helping to maintain better indoor air quality.
Reasons why air fryers have lower air pollution:
Low emissions: Air fryers emit significantly lower levels of PM and VOC than frying.
Sealed heating system: can effectively seal oil smoke and pollutants and reduce escape.
Reduced odor diffusion: Even when using high-fat ingredients, there is less odor and aerosol.
Sources of pollution that still require attention:
PM2.5 / PM10 suspended particulate matter: High-temperature grease or uncleaned frying basket will release PM2.5 / PM10.
VOC (Volatile Organic Compounds): such as acrolein and formaldehyde, which are produced when the temperature is too high.
Cooking odors and aerosols: Foods such as fish and spices still release some odor.
Safety Tips:
When using, ventilation should be improved, such as moving near a window or turning on a range hood.
Continue to ventilate for 10–15 minutes after cooking to disperse any remaining contamination.
Clean the frying basket and the machine body regularly to avoid carbonization of residue and smoke.
Avoid high-temperature frying and keep the oil below its smoke point to reduce pollution.
What is PM2.5? What impact does it have on the human body?
PM2.5 refers to fine suspended particles with a diameter of less than or equal to 2.5 microns, which is about 1/28 of the diameter of a hair.
These microparticles are extremely small and difficult to detect with the naked eye, but they can penetrate deep into the lungs and even into the alveoli to enter the blood circulation, causing long-term systemic harm to human health.
🧪 Main sources of PM2.5:
Vehicle emissions (especially diesel vehicles)
Industrial combustion (coal burning, incineration)
Restaurant fumes (such as frying and stir-frying)
Indoor pollution sources (such as scented candles, incense sticks, and smoking)
Secondary particles generated by atmospheric reactions (such as sulfates and nitrates)
🫁 PM2.5 health hazards:
Respiratory diseases:
Once it enters the lungs, it can cause chronic bronchitis, asthma attacks, and reduced lung function, with the impact being particularly pronounced in children and the elderly.
Cardiovascular disease:
PM2.5 can enter the blood circulation, leading to an increased risk of hypertension, arteriosclerosis, myocardial infarction, and stroke.
Immune and nervous system damage:
Studies have found that long-term exposure may be associated with decreased immunity, cognitive decline, dementia, etc.
Cancer risk:
The World Health Organization (WHO) classifies PM2.5 as a Class 1 carcinogen, which has a clear link with the occurrence of lung cancer.
👶 High-risk groups:
Pregnant women (affects fetal development and may lead to low birth weight and premature birth)
Young children (whose lungs are not fully developed)
Elderly people and patients with chronic diseases (weak cardiopulmonary function)
People with allergies or asthma (prone to acute reactions)
🛡️ How to reduce the harm of PM2.5?
Stay informed about air quality: Use air quality monitoring apps or government websites to monitor PM2.5 concentrations in real time.
Choose high-efficiency air purification equipment:
It is recommended to choose a product equipped with a HEPA H14 grade filter, which can effectively filter 99.995% of particles.
Yishun Technology's medical-grade air purifier has obtained GMP certification and is suitable for medical, home and commercial spaces.
Reducing pollution sources:
Use less scented candles and incense sticks, and reduce open frying and stir-frying.
Use low-pollution cooking methods such as air fryers and rice cookers.
Enhance ventilation: Keep indoor air circulating and use an air purifier if necessary.
These microparticles are extremely small and difficult to detect with the naked eye, but they can penetrate deep into the lungs and even into the alveoli to enter the blood circulation, causing long-term systemic harm to human health.
🧪 Main sources of PM2.5:
Vehicle emissions (especially diesel vehicles)
Industrial combustion (coal burning, incineration)
Restaurant fumes (such as frying and stir-frying)
Indoor pollution sources (such as scented candles, incense sticks, and smoking)
Secondary particles generated by atmospheric reactions (such as sulfates and nitrates)
🫁 PM2.5 health hazards:
Respiratory diseases:
Once it enters the lungs, it can cause chronic bronchitis, asthma attacks, and reduced lung function, with the impact being particularly pronounced in children and the elderly.
Cardiovascular disease:
PM2.5 can enter the blood circulation, leading to an increased risk of hypertension, arteriosclerosis, myocardial infarction, and stroke.
Immune and nervous system damage:
Studies have found that long-term exposure may be associated with decreased immunity, cognitive decline, dementia, etc.
Cancer risk:
The World Health Organization (WHO) classifies PM2.5 as a Class 1 carcinogen, which has a clear link with the occurrence of lung cancer.
👶 High-risk groups:
Pregnant women (affects fetal development and may lead to low birth weight and premature birth)
Young children (whose lungs are not fully developed)
Elderly people and patients with chronic diseases (weak cardiopulmonary function)
People with allergies or asthma (prone to acute reactions)
🛡️ How to reduce the harm of PM2.5?
Stay informed about air quality: Use air quality monitoring apps or government websites to monitor PM2.5 concentrations in real time.
Choose high-efficiency air purification equipment:
It is recommended to choose a product equipped with a HEPA H14 grade filter, which can effectively filter 99.995% of particles.
Yishun Technology's medical-grade air purifier has obtained GMP certification and is suitable for medical, home and commercial spaces.
Reducing pollution sources:
Use less scented candles and incense sticks, and reduce open frying and stir-frying.
Use low-pollution cooking methods such as air fryers and rice cookers.
Enhance ventilation: Keep indoor air circulating and use an air purifier if necessary.
What are IAQ and AQI?
IAQ (Indoor Air Quality) and AQI (Air Quality Index) are both indicators of air quality, but they are used in different contexts:
IAQ: Indoor Air Quality Index
IAQ is a measure of the level of air pollution in indoor environments, commonly found in confined spaces such as homes, offices, hospitals, and classrooms.
Pollutants of primary concern include:
Volatile organic compounds (VOCs): such as formaldehyde, benzene, and phthalates, commonly found in paints, detergents, and plastic products.
Carbon dioxide (CO₂): Poor ventilation in the space can cause CO₂ concentrations to rise, causing headaches and fatigue.
Microbial pollutants: such as mold spores, bacteria, dust mites, etc., may cause allergies or asthma.
📌 IAQ is an important indicator for assessing whether a closed indoor environment is suitable for long-term living or working.
🌫️ AQI: Air Quality Index (outdoor)
AQI is a comprehensive indicator for measuring outdoor air quality. It is released immediately by government agencies (such as the Environmental Protection Agency) to assess whether the air is healthy.
The main monitored pollutants include:
PM2.5 / PM10: fine particulate matter and respirable particulate matter ozone (O₃)
Carbon monoxide (CO)
Nitrogen dioxide (NO₂)
Sulfur dioxide (SO₂)
📌 AQI color levels (green, yellow, orange, red, purple) are commonly used to remind people whether they need to wear masks when going out or avoid outdoor activities.
🛡️ Yishun Technology recommends:
IAQ is more closely related to health and should be actively monitored and improved, especially when staying in confined spaces (such as clinics, homes, and offices) for a long time.
Using air purification equipment equipped with HEPA filter + activated carbon + UV-C sterilization function can effectively improve IAQ and protect respiratory health.
New air purification system: Introducing fresh air from the outside and filtering PM2.5 and VOCs simultaneously is an advanced solution to improve IAQ.
IAQ: Indoor Air Quality Index
IAQ is a measure of the level of air pollution in indoor environments, commonly found in confined spaces such as homes, offices, hospitals, and classrooms.
Pollutants of primary concern include:
Volatile organic compounds (VOCs): such as formaldehyde, benzene, and phthalates, commonly found in paints, detergents, and plastic products.
Carbon dioxide (CO₂): Poor ventilation in the space can cause CO₂ concentrations to rise, causing headaches and fatigue.
Microbial pollutants: such as mold spores, bacteria, dust mites, etc., may cause allergies or asthma.
📌 IAQ is an important indicator for assessing whether a closed indoor environment is suitable for long-term living or working.
🌫️ AQI: Air Quality Index (outdoor)
AQI is a comprehensive indicator for measuring outdoor air quality. It is released immediately by government agencies (such as the Environmental Protection Agency) to assess whether the air is healthy.
The main monitored pollutants include:
PM2.5 / PM10: fine particulate matter and respirable particulate matter ozone (O₃)
Carbon monoxide (CO)
Nitrogen dioxide (NO₂)
Sulfur dioxide (SO₂)
📌 AQI color levels (green, yellow, orange, red, purple) are commonly used to remind people whether they need to wear masks when going out or avoid outdoor activities.
🛡️ Yishun Technology recommends:
IAQ is more closely related to health and should be actively monitored and improved, especially when staying in confined spaces (such as clinics, homes, and offices) for a long time.
Using air purification equipment equipped with HEPA filter + activated carbon + UV-C sterilization function can effectively improve IAQ and protect respiratory health.
New air purification system: Introducing fresh air from the outside and filtering PM2.5 and VOCs simultaneously is an advanced solution to improve IAQ.
What is a HEPA filter?
HEPA (High-Efficiency Particulate Air) filters are a type of high-efficiency air filter that can intercept extremely small suspended particles in the air. They are commonly used in medical institutions, clean rooms, and high-end air purification equipment.
🔬 Function and principle:
HEPA filters are made of extremely fine glass fibers or synthetic fibers interwoven together to capture particles through diffusion, interception, inertial impaction, and sieve effect.
Standard HEPA filters remove up to 99.97% of particles larger than 0.3 microns (the most difficult particle size to filter), including dust, pollen, mold spores, bacteria, smoke, and allergens.
🧪 HEPA filter rating (according to EN 1822 EU standard):
Grade Filtration Efficiency (for 0.3µm particles)
H10 ≧ 85%
H11 ≧ 95%
H12 ≧ 99.5%
H13 ≧ 99.97%
H14 ≧ 99.995% (medical grade)
✅ H13 is a high-efficiency grade, suitable for most home and commercial air purifiers 🏥 H14 is a medical grade, suitable for high-requirement spaces such as operating rooms, intensive care units, and dental clinics
📌 Yishun Technology's air purification equipment uses HEPA H14 filters, combined with activated carbon and UV-C sterilization functions, to create air quality that meets the sterility requirements of operating rooms. It is widely used in:
Hospitals, clinics, postpartum care centers, families with allergies, children's rooms, commercial office spaces, libraries
🔬 Function and principle:
HEPA filters are made of extremely fine glass fibers or synthetic fibers interwoven together to capture particles through diffusion, interception, inertial impaction, and sieve effect.
Standard HEPA filters remove up to 99.97% of particles larger than 0.3 microns (the most difficult particle size to filter), including dust, pollen, mold spores, bacteria, smoke, and allergens.
🧪 HEPA filter rating (according to EN 1822 EU standard):
Grade Filtration Efficiency (for 0.3µm particles)
H10 ≧ 85%
H11 ≧ 95%
H12 ≧ 99.5%
H13 ≧ 99.97%
H14 ≧ 99.995% (medical grade)
✅ H13 is a high-efficiency grade, suitable for most home and commercial air purifiers 🏥 H14 is a medical grade, suitable for high-requirement spaces such as operating rooms, intensive care units, and dental clinics
📌 Yishun Technology's air purification equipment uses HEPA H14 filters, combined with activated carbon and UV-C sterilization functions, to create air quality that meets the sterility requirements of operating rooms. It is widely used in:
Hospitals, clinics, postpartum care centers, families with allergies, children's rooms, commercial office spaces, libraries
How to improve indoor air quality?
Good indoor air quality (IAQ) is crucial for maintaining respiratory health and preventing allergies, asthma, and other illnesses. Improving IAQ requires three key approaches: source control, ventilation management, and effective filtration.
🧴 1. Reduce pollution sources (source control)
Choose low-volatile building materials and furniture: avoid using boards and paints containing harmful substances such as formaldehyde and benzene.
Reduce indoor polluting behaviors: such as burning incense, lighting candles, smoking, and using scented cleaners or air fresheners.
Clean air conditioning and ventilation systems regularly: to prevent the accumulation of dust, mold, and dust mites.
🌬️ 2. Enhance ventilation (introduction of fresh air)
Natural ventilation: Open windows to promote fresh air circulation and reduce carbon dioxide and VOC concentrations.
Mechanical ventilation: If the outdoor air quality is poor, you can install a fresh air fan with a high-efficiency filtration system or a "fresh air purification system".
Yishun Technology's "Fresh Air Purification System" can introduce filtered fresh outside air and discharge indoor exhaust gas, improving indoor air circulation and oxygen content.
🛡️ 3. Use high-efficiency air purification equipment (air purification)
Choose an air purifier with a medical-grade HEPA H14 filter to effectively remove PM2.5, allergens, bacteria, and viruses.
Combined with activated carbon filter and UV-C germicidal lamp, it can fully purify harmful gases and microorganisms in the air.
We recommend using the "Recirculating Air Purifier Series" from Yishun Technology, which meets the strict standards of medical institutions and is also suitable for homes and commercial spaces.
✅ Recommended actions:
Ventilate at least twice a day, each time for more than 15 minutes.
Clean the air filter and check it at least once a month, and replace it regularly according to the usage environment.
Avoid using products containing fragrances or chemical solvents in confined spaces.
🧴 1. Reduce pollution sources (source control)
Choose low-volatile building materials and furniture: avoid using boards and paints containing harmful substances such as formaldehyde and benzene.
Reduce indoor polluting behaviors: such as burning incense, lighting candles, smoking, and using scented cleaners or air fresheners.
Clean air conditioning and ventilation systems regularly: to prevent the accumulation of dust, mold, and dust mites.
🌬️ 2. Enhance ventilation (introduction of fresh air)
Natural ventilation: Open windows to promote fresh air circulation and reduce carbon dioxide and VOC concentrations.
Mechanical ventilation: If the outdoor air quality is poor, you can install a fresh air fan with a high-efficiency filtration system or a "fresh air purification system".
Yishun Technology's "Fresh Air Purification System" can introduce filtered fresh outside air and discharge indoor exhaust gas, improving indoor air circulation and oxygen content.
🛡️ 3. Use high-efficiency air purification equipment (air purification)
Choose an air purifier with a medical-grade HEPA H14 filter to effectively remove PM2.5, allergens, bacteria, and viruses.
Combined with activated carbon filter and UV-C germicidal lamp, it can fully purify harmful gases and microorganisms in the air.
We recommend using the "Recirculating Air Purifier Series" from Yishun Technology, which meets the strict standards of medical institutions and is also suitable for homes and commercial spaces.
✅ Recommended actions:
Ventilate at least twice a day, each time for more than 15 minutes.
Clean the air filter and check it at least once a month, and replace it regularly according to the usage environment.
Avoid using products containing fragrances or chemical solvents in confined spaces.
How to choose low pollution building materials
Even a luxuriously decorated home or office space may harbor carcinogenic risks such as volatile organic compounds (VOCs) and formaldehyde if building materials are not carefully selected. These harmful substances will continue to be released into the air after the renovation is completed, affecting the health of family members and employees.
🧪 Common sources of highly polluting building materials:
Walls and partitions: plywood partitions, wallpaper, painted glossy walls Floor materials: PVC floor tiles, chemical fiber carpets, composite wood panels Ceiling materials: mineral fiber boards, gypsum boards Furniture panels: plywood, dense boards, particle boards and other artificial boards Paints: Contains VOCs such as formaldehyde, benzene, toluene, and xylene
☣ What are the hazards of formaldehyde?
Wide range of sources: commonly used in plywood, coatings, adhesives, foam materials, chemical fibers, etc.
Health risks:
Irritates the eyes, nose, and throat, causing respiratory discomfort, allergies, and asthma. Classified as a Group 1 carcinogen by the International Agency for Research on Cancer (IARC), long-term exposure may lead to chromosomal abnormalities, tumors, and developmental delays in children.
✅ How to choose low-pollution building materials and furniture?
🏷 Choose products with the "Green Building Materials Label":
The Ministry of the Interior's Building Research Institute has been promoting a green building material labeling system since 2004, classifying them according to their environmental and health attributes into:
Healthy green building materials: low volatility, low odor, low pollution (strict emission standards for formaldehyde and VOC)
Ecological green building materials, recycled green building materials, high-performance green building materials
✅ Emission standards for healthy green building materials:
Formaldehyde: ≤0.08 mg/m²·hr
VOC: ≤0.19 mg/m²·hr
👉 Products that pass this standard have pollution emissions hundreds of times lower than traditional building materials.
🎨 Choose low-pollution paint/varnish:
Water-based paints are preferred, as they have low volatility and are safer. Use paint products that have passed the Green Building Materials Label or are recommended by the Environmental Protection Agency.
Refer to the government-published "Clean Air Environmental Handbook" for low-pollution DIY painting techniques.
🪑 Choose low-pollution furniture:
Avoid using plywood and compact boards: they contain high concentrations of adhesives and release high amounts of formaldehyde. Choose solid wood furniture: they have lower formaldehyde levels. Choose painted furniture with a green building material label. Maintain ventilation after purchasing new furniture, especially in confined spaces such as drawers and wardrobes. Open them regularly to ventilate.
🌬️ What to do after decoration?
Even if you use low-pollution building materials, you should still take the following actions after moving into your new home or completing renovations:
Maintain good air circulation (open windows and increase ventilation)
Use a medical-grade air purifier (such as Yishun Technology's HEPA H14+activated carbon+UV series)
Equipped with a new air purification system, it can filter and introduce fresh air from outside, effectively reducing the concentration of harmful gases indoors
🧪 Common sources of highly polluting building materials:
Walls and partitions: plywood partitions, wallpaper, painted glossy walls Floor materials: PVC floor tiles, chemical fiber carpets, composite wood panels Ceiling materials: mineral fiber boards, gypsum boards Furniture panels: plywood, dense boards, particle boards and other artificial boards Paints: Contains VOCs such as formaldehyde, benzene, toluene, and xylene
☣ What are the hazards of formaldehyde?
Wide range of sources: commonly used in plywood, coatings, adhesives, foam materials, chemical fibers, etc.
Health risks:
Irritates the eyes, nose, and throat, causing respiratory discomfort, allergies, and asthma. Classified as a Group 1 carcinogen by the International Agency for Research on Cancer (IARC), long-term exposure may lead to chromosomal abnormalities, tumors, and developmental delays in children.
✅ How to choose low-pollution building materials and furniture?
🏷 Choose products with the "Green Building Materials Label":
The Ministry of the Interior's Building Research Institute has been promoting a green building material labeling system since 2004, classifying them according to their environmental and health attributes into:
Healthy green building materials: low volatility, low odor, low pollution (strict emission standards for formaldehyde and VOC)
Ecological green building materials, recycled green building materials, high-performance green building materials
✅ Emission standards for healthy green building materials:
Formaldehyde: ≤0.08 mg/m²·hr
VOC: ≤0.19 mg/m²·hr
👉 Products that pass this standard have pollution emissions hundreds of times lower than traditional building materials.
🎨 Choose low-pollution paint/varnish:
Water-based paints are preferred, as they have low volatility and are safer. Use paint products that have passed the Green Building Materials Label or are recommended by the Environmental Protection Agency.
Refer to the government-published "Clean Air Environmental Handbook" for low-pollution DIY painting techniques.
🪑 Choose low-pollution furniture:
Avoid using plywood and compact boards: they contain high concentrations of adhesives and release high amounts of formaldehyde. Choose solid wood furniture: they have lower formaldehyde levels. Choose painted furniture with a green building material label. Maintain ventilation after purchasing new furniture, especially in confined spaces such as drawers and wardrobes. Open them regularly to ventilate.
🌬️ What to do after decoration?
Even if you use low-pollution building materials, you should still take the following actions after moving into your new home or completing renovations:
Maintain good air circulation (open windows and increase ventilation)
Use a medical-grade air purifier (such as Yishun Technology's HEPA H14+activated carbon+UV series)
Equipped with a new air purification system, it can filter and introduce fresh air from outside, effectively reducing the concentration of harmful gases indoors
How much is the air cleaner
When indoor air cannot be effectively improved through natural ventilation or air-conditioning systems, choosing an air purifier with appropriate performance becomes an important means of protecting respiratory health.
🧪 Main functions of air purifier:
The principle of an air purifier is to remove pollutants from the air through filtering, adsorption of harmful substances and sterilization. Common pollutants include:
Suspended particulate matter (PM2.5, PM10)
Pollen, dust mites, mold spores, cigarette smoke, oil smoke particles, formaldehyde, benzene and other VOC gases, bacteria, viruses and other pathogens
🌀 Types of air purifiers available on the market:
Type Features and Description Filter type Uses HEPA or activated carbon filters to filter particles and gases, and is the most common and stable type Negative ion type Releases negative ions to settle pollutants, but some products will produce ozone, so be careful when choosing Photocatalyst type Can decompose some organic matter and bacteria, but the effect depends on the intensity of ultraviolet light and environmental conditions Electronic type Uses electrostatic dust collection, but is prone to ozone problems and its safety is questionable Composite type Combines multiple technologies, such as Yishun Technology products that combine HEPA, activated carbon and UV-C
📊 Key indicators for evaluating air purifier performance:
CADR (Clean Air Delivery Rate) Clean air delivery rate:
Indicates how many cubic meters of air the purifier can process per minute. The higher the value, the stronger the filtration efficiency and the larger the space it is suitable for.
Filter grade and filter material design:
It is recommended to use HEPA H13 / H14 medical grade filter, which can filter 99.97% to 99.995% of 0.3 micron suspended particles and is equipped with an activated carbon layer to absorb VOCs, organic gases, and odors.
Filter material replacement cycle and consumables availability:
The filter must be replaced regularly to ensure the purification effect and avoid secondary pollution
Security:
⚠ Avoid using models that produce ozone. Long-term inhalation of high concentrations of ozone may damage lung and cardiovascular health.
🚫 Myths worth noting:
❗ Not all air conditioners are good for your health!
Electronic and negative ion purifiers that produce ozone may cause respiratory irritation and health risks.
International medical research indicates that long-term inhalation of high concentrations of ozone can cause lung damage.
If the filter is not replaced or has not been cleaned for a long time, it will become a breeding ground for bacteria.
✅ Yishun Technology's recommended selection criteria:
✅ Use GMP-certified medical-grade air purification equipment ✅ Choose a three-in-one design with HEPA H14 + activated carbon + UV-C germicidal light source ✅ The product has a large-area circulating airflow design and a high CADR value ✅ Suitable for use in multiple places such as homes, hospitals, clinics, offices and confinement centers
🧪 Main functions of air purifier:
The principle of an air purifier is to remove pollutants from the air through filtering, adsorption of harmful substances and sterilization. Common pollutants include:
Suspended particulate matter (PM2.5, PM10)
Pollen, dust mites, mold spores, cigarette smoke, oil smoke particles, formaldehyde, benzene and other VOC gases, bacteria, viruses and other pathogens
🌀 Types of air purifiers available on the market:
Type Features and Description Filter type Uses HEPA or activated carbon filters to filter particles and gases, and is the most common and stable type Negative ion type Releases negative ions to settle pollutants, but some products will produce ozone, so be careful when choosing Photocatalyst type Can decompose some organic matter and bacteria, but the effect depends on the intensity of ultraviolet light and environmental conditions Electronic type Uses electrostatic dust collection, but is prone to ozone problems and its safety is questionable Composite type Combines multiple technologies, such as Yishun Technology products that combine HEPA, activated carbon and UV-C
📊 Key indicators for evaluating air purifier performance:
CADR (Clean Air Delivery Rate) Clean air delivery rate:
Indicates how many cubic meters of air the purifier can process per minute. The higher the value, the stronger the filtration efficiency and the larger the space it is suitable for.
Filter grade and filter material design:
It is recommended to use HEPA H13 / H14 medical grade filter, which can filter 99.97% to 99.995% of 0.3 micron suspended particles and is equipped with an activated carbon layer to absorb VOCs, organic gases, and odors.
Filter material replacement cycle and consumables availability:
The filter must be replaced regularly to ensure the purification effect and avoid secondary pollution
Security:
⚠ Avoid using models that produce ozone. Long-term inhalation of high concentrations of ozone may damage lung and cardiovascular health.
🚫 Myths worth noting:
❗ Not all air conditioners are good for your health!
Electronic and negative ion purifiers that produce ozone may cause respiratory irritation and health risks.
International medical research indicates that long-term inhalation of high concentrations of ozone can cause lung damage.
If the filter is not replaced or has not been cleaned for a long time, it will become a breeding ground for bacteria.
✅ Yishun Technology's recommended selection criteria:
✅ Use GMP-certified medical-grade air purification equipment ✅ Choose a three-in-one design with HEPA H14 + activated carbon + UV-C germicidal light source ✅ The product has a large-area circulating airflow design and a high CADR value ✅ Suitable for use in multiple places such as homes, hospitals, clinics, offices and confinement centers
Ozone! Ozone! It's essential in the sky, but is the concentration on the ground a concern?
Ozone (O₃) is a gas that has a "dual-side effect" on both the atmosphere and the human body.
Ozone in the high altitude: It forms the "ozone layer", absorbs ultraviolet rays, protects the earth from radiation damage, and is an indispensable "natural shield" for humans.
Ozone in near-ground space: Related to "photochemical smog", it is a strong oxidizing pollutant that may irritate the respiratory tract, eyes and lungs, and pose a health hazard.
🌍 The World Health Organization (WHO) and environmental protection agencies in various countries have listed high concentrations of ozone as one of the outdoor air pollutants that need to be controlled.
🔍 Why is ozone produced "indoors"?
Common indoor ozone sources:
Copiers, laser printers, air purifiers (especially those that use negative ions or ozone)
During use, when electrical equipment acts on oxygen (O₂) in the air to produce an ionization reaction, ozone (O₃) is generated.
📌 Ozone easily accumulates, especially in confined spaces or when the machine is poorly maintained. Excessive concentration can cause respiratory discomfort or aggravate asthma symptoms.
⚠️ What are the health risks of ozone?
Causes sore throat, chest tightness, decreased lung function, inducing asthma attacks and chronic respiratory inflammation. Long-term exposure may increase the risk of allergies, immune system disorders, and cardiopulmonary diseases.
❓ Can air purifiers remove indoor ozone?
Most commercially available air purifiers are ineffective at filtering ozone. Without specialized ozone removal technology, their effectiveness is very limited. It's recommended to avoid models that actively generate ozone (such as ozone sterilizers and some negative ionizers).
✅ How to reduce indoor ozone hazards?
Choose an air purifier that does not produce ozone:
Use HEPA filter + activated carbon + UV-C sterilization as the first choice. Avoid using electronic, ozone and negative ion products.
Improve ventilation:
Always open windows or activate the exhaust system when using the device
Correct device placement:
The printer should be placed in a well-ventilated area and away from areas where people are active.
Reference regulatory recommendations:
According to the US OSHA standard, the 8-hour permissible average exposure concentration of ozone is 0.1 ppm, and office spaces should avoid exceeding the standard.
🔄 What other indoor pollution may occur in the office?
In addition to ozone, common office pollutants include:
Formaldehyde, VOC (volatile organic compounds)
Dust generated by laser printers and photocopiers
CO₂ accumulation due to poor ventilation
🛡️ It is recommended to equip the office with a "new clean air system" or medical-grade air purification equipment, combined with good ventilation and air quality monitoring to effectively protect office health.
Ozone in the high altitude: It forms the "ozone layer", absorbs ultraviolet rays, protects the earth from radiation damage, and is an indispensable "natural shield" for humans.
Ozone in near-ground space: Related to "photochemical smog", it is a strong oxidizing pollutant that may irritate the respiratory tract, eyes and lungs, and pose a health hazard.
🌍 The World Health Organization (WHO) and environmental protection agencies in various countries have listed high concentrations of ozone as one of the outdoor air pollutants that need to be controlled.
🔍 Why is ozone produced "indoors"?
Common indoor ozone sources:
Copiers, laser printers, air purifiers (especially those that use negative ions or ozone)
During use, when electrical equipment acts on oxygen (O₂) in the air to produce an ionization reaction, ozone (O₃) is generated.
📌 Ozone easily accumulates, especially in confined spaces or when the machine is poorly maintained. Excessive concentration can cause respiratory discomfort or aggravate asthma symptoms.
⚠️ What are the health risks of ozone?
Causes sore throat, chest tightness, decreased lung function, inducing asthma attacks and chronic respiratory inflammation. Long-term exposure may increase the risk of allergies, immune system disorders, and cardiopulmonary diseases.
❓ Can air purifiers remove indoor ozone?
Most commercially available air purifiers are ineffective at filtering ozone. Without specialized ozone removal technology, their effectiveness is very limited. It's recommended to avoid models that actively generate ozone (such as ozone sterilizers and some negative ionizers).
✅ How to reduce indoor ozone hazards?
Choose an air purifier that does not produce ozone:
Use HEPA filter + activated carbon + UV-C sterilization as the first choice. Avoid using electronic, ozone and negative ion products.
Improve ventilation:
Always open windows or activate the exhaust system when using the device
Correct device placement:
The printer should be placed in a well-ventilated area and away from areas where people are active.
Reference regulatory recommendations:
According to the US OSHA standard, the 8-hour permissible average exposure concentration of ozone is 0.1 ppm, and office spaces should avoid exceeding the standard.
🔄 What other indoor pollution may occur in the office?
In addition to ozone, common office pollutants include:
Formaldehyde, VOC (volatile organic compounds)
Dust generated by laser printers and photocopiers
CO₂ accumulation due to poor ventilation
🛡️ It is recommended to equip the office with a "new clean air system" or medical-grade air purification equipment, combined with good ventilation and air quality monitoring to effectively protect office health.
How can I tell if an indoor ventilation or air conditioning system is suitable?
To assess whether an indoor ventilation or air conditioning system is effective, one of the key indicators is the indoor carbon dioxide (CO₂) concentration.
🧪 Why can CO₂ concentration reflect ventilation conditions?
CO₂ is one of the metabolic products of human respiratory metabolism. When indoor ventilation is insufficient, CO₂ easily accumulates and exceeds the standard.
High concentrations of CO₂ can make people feel dizzy, tired, and inattentive, and may indirectly increase the risk of pathogen transmission.
🌬️ International and regional standard recommendations:
According to ASHRAE (American Society of Refrigeration and Air-Conditioning Engineering) Standard 62-1989:
It is recommended that each person in a general office space be provided with 15 to 20 CFM (cubic feet per minute) of fresh air.
Indoor CO₂ concentration should be controlled below 1,000 ppm. Exceeding this level indicates insufficient indoor ventilation.
👉 Hong Kong's Indoor Air Quality Guidelines also recommend that the optimal indoor CO₂ concentration should be maintained between 600 and 800 ppm.
🕐 High-risk period: Lunchtime in confined spaces such as medium to large offices and conference rooms. If:
The period between 11 a.m. and 3 p.m. is characterized by low ventilation. If the CO₂ concentration exceeds 1,000 ppm during this time, it indicates poor ventilation efficiency. You may need to check for poor exhaust or insufficient outdoor air supply.
✅ Coping suggestions:
Real-time monitoring of CO₂ concentrations using CO₂ sensors provides instant insights into indoor ventilation conditions. Enhance ventilation and exhaust. Design and install a "new clean air system" to introduce filtered outside air, the most effective way to replenish air in confined spaces. Improve air conditioning circulation system configuration. If air conditioning is not supplied with outside air, use a high-efficiency air purification device to filter out pollutants. Open windows for ventilation (if feasible).
Open windows or start exhaust fans daily to increase natural ventilation
🧪 Why can CO₂ concentration reflect ventilation conditions?
CO₂ is one of the metabolic products of human respiratory metabolism. When indoor ventilation is insufficient, CO₂ easily accumulates and exceeds the standard.
High concentrations of CO₂ can make people feel dizzy, tired, and inattentive, and may indirectly increase the risk of pathogen transmission.
🌬️ International and regional standard recommendations:
According to ASHRAE (American Society of Refrigeration and Air-Conditioning Engineering) Standard 62-1989:
It is recommended that each person in a general office space be provided with 15 to 20 CFM (cubic feet per minute) of fresh air.
Indoor CO₂ concentration should be controlled below 1,000 ppm. Exceeding this level indicates insufficient indoor ventilation.
👉 Hong Kong's Indoor Air Quality Guidelines also recommend that the optimal indoor CO₂ concentration should be maintained between 600 and 800 ppm.
🕐 High-risk period: Lunchtime in confined spaces such as medium to large offices and conference rooms. If:
The period between 11 a.m. and 3 p.m. is characterized by low ventilation. If the CO₂ concentration exceeds 1,000 ppm during this time, it indicates poor ventilation efficiency. You may need to check for poor exhaust or insufficient outdoor air supply.
✅ Coping suggestions:
Real-time monitoring of CO₂ concentrations using CO₂ sensors provides instant insights into indoor ventilation conditions. Enhance ventilation and exhaust. Design and install a "new clean air system" to introduce filtered outside air, the most effective way to replenish air in confined spaces. Improve air conditioning circulation system configuration. If air conditioning is not supplied with outside air, use a high-efficiency air purification device to filter out pollutants. Open windows for ventilation (if feasible).
Open windows or start exhaust fans daily to increase natural ventilation
How to check if there is any problem with the indoor ventilation or air conditioning system?
A poorly functioning ventilation system can lead to the accumulation of indoor air pollutants, excessive CO₂ levels, and even impacts on human health and comfort. The following are common inspection points to help you systematically identify potential issues:
✅ Air delivery and intake confirmation:
Confirm whether the external air supply equipment is operating normally?
Is the ventilation system open normally and is there any blockage in the external air inlet?
Is the outside air inlet clean and free of contaminant accumulation?
Is there air entering the external air inlet?
Is the air conditioning and fresh air system started and shut down on time?
Check the air conditioning system for musty odors, contamination, or signs of leaks?
🔄 Air circulation and ventilation system:
Are the return air and supply air systems operating in sync?
Is the air conditioner fan running normally and balanced?
Does the ventilation volume meet the usage requirements of each area?
🔧 Equipment and system component inspection:
Is the filter clean and installed correctly?
Is the filter replacement frequency reasonable?
Is the cooling coil clean and free of condensation?
Is the exhaust fan or suction fan operating properly?
🧯 Safety and pollutant emissions:
Are there any signs of refrigerant or gas leaks in the air conditioning equipment?
Is there any backflow of gaseous combustion products?
Is the exhaust pipe correctly led out and is there no indoor backflow?
Are polluted gases being discharged from the correct exhaust vents rather than seeping through wall cracks or floor slabs?
🧪 Air quality and monitoring recommendations:
Are CO₂/PM2.5 sensors installed?
Are there any unusual odors, smoke, mold, or excessive moisture?
Does air dilution or make-up air meet ASHRAE recommendations?
🔍 Source: Recommended guidelines from the US environmental group BEAM
✅ Air delivery and intake confirmation:
Confirm whether the external air supply equipment is operating normally?
Is the ventilation system open normally and is there any blockage in the external air inlet?
Is the outside air inlet clean and free of contaminant accumulation?
Is there air entering the external air inlet?
Is the air conditioning and fresh air system started and shut down on time?
Check the air conditioning system for musty odors, contamination, or signs of leaks?
🔄 Air circulation and ventilation system:
Are the return air and supply air systems operating in sync?
Is the air conditioner fan running normally and balanced?
Does the ventilation volume meet the usage requirements of each area?
🔧 Equipment and system component inspection:
Is the filter clean and installed correctly?
Is the filter replacement frequency reasonable?
Is the cooling coil clean and free of condensation?
Is the exhaust fan or suction fan operating properly?
🧯 Safety and pollutant emissions:
Are there any signs of refrigerant or gas leaks in the air conditioning equipment?
Is there any backflow of gaseous combustion products?
Is the exhaust pipe correctly led out and is there no indoor backflow?
Are polluted gases being discharged from the correct exhaust vents rather than seeping through wall cracks or floor slabs?
🧪 Air quality and monitoring recommendations:
Are CO₂/PM2.5 sensors installed?
Are there any unusual odors, smoke, mold, or excessive moisture?
Does air dilution or make-up air meet ASHRAE recommendations?
🔍 Source: Recommended guidelines from the US environmental group BEAM
How to improve indoor ventilation or air conditioning systems
Good ventilation and air conditioning systems are key to maintaining indoor air quality.
When the ventilation system is old or malfunctioning, pollutants can easily accumulate, leading to health risks such as dizziness, fatigue, and excessive CO₂.
✅ If the system is already experiencing performance issues, you can improve it in the following ways:
Re-adjust air volume and air source configuration. Re-evaluate and adjust air supply and exhaust design based on space usage, number of users, location of pollution sources, and other conditions. Increase external air supply and increase the proportion of fresh air introduced to improve oxygen content and air dilution. Remove wind resistance obstacles, remove wind blocks, and re-plan furniture configuration to ensure smooth airflow. Control the location of pollution sources and heat loads to avoid concentrating pollution heat sources in ventilation dead corners. Install local exhaust equipment (such as hoods and extraction arms) when necessary.
Improve the system's air supply power and efficiency by upgrading the fan motor and improving the air duct design to increase ventilation coverage and speed. Install or optimize air purification equipment to enhance the air filtration function in areas with insufficient ventilation and filter out PM2.5, VOCs, microorganisms and other pollution sources.
📌 Additional practical suggestions:
You can use Yishun Technology's new air purification system: specially designed for space air replenishment, combining filtration, air guidance and quiet efficiency. It is suitable for offices, conference rooms, clinics, classrooms and other spaces that are used for a long time. It can be matched with the medical-grade recirculating air purifier series to achieve dual protection of ventilation + filtration.
🔍 Source: Hong Kong's "Guidelines on Indoor Air Quality Management in Offices and Public Places"
When the ventilation system is old or malfunctioning, pollutants can easily accumulate, leading to health risks such as dizziness, fatigue, and excessive CO₂.
✅ If the system is already experiencing performance issues, you can improve it in the following ways:
Re-adjust air volume and air source configuration. Re-evaluate and adjust air supply and exhaust design based on space usage, number of users, location of pollution sources, and other conditions. Increase external air supply and increase the proportion of fresh air introduced to improve oxygen content and air dilution. Remove wind resistance obstacles, remove wind blocks, and re-plan furniture configuration to ensure smooth airflow. Control the location of pollution sources and heat loads to avoid concentrating pollution heat sources in ventilation dead corners. Install local exhaust equipment (such as hoods and extraction arms) when necessary.
Improve the system's air supply power and efficiency by upgrading the fan motor and improving the air duct design to increase ventilation coverage and speed. Install or optimize air purification equipment to enhance the air filtration function in areas with insufficient ventilation and filter out PM2.5, VOCs, microorganisms and other pollution sources.
📌 Additional practical suggestions:
You can use Yishun Technology's new air purification system: specially designed for space air replenishment, combining filtration, air guidance and quiet efficiency. It is suitable for offices, conference rooms, clinics, classrooms and other spaces that are used for a long time. It can be matched with the medical-grade recirculating air purifier series to achieve dual protection of ventilation + filtration.
🔍 Source: Hong Kong's "Guidelines on Indoor Air Quality Management in Offices and Public Places"
