Overview of Indoor Pollution Sources

There are various sources of indoor pollution, mainly divided intoChemical pollution, biological pollution, physical pollution and radioactive pollutionFour categories.Chemical pollution includes harmful gases released by decoration materials such as formaldehyde and benzene; biological pollution covers microorganisms such as mold and dust mites; physical pollution mainly refers to PM2.5, odors, etc.; radioactive pollution comes from radon gas in natural stones.Among them,Formaldehyde released from decoration materials and furnitureIt is the most harmful pollution source and attracts the most attention, followed by mold growing in humid environments and PM2.5 accumulation caused by insufficient ventilation.Proper ventilation, choosing environmentally friendly materials and regular cleaning are keys to reducing pollution.

Chemical pollution: an invisible threat to decoration and furniture

Decoration materials such as artificial boards, paints, adhesives, etc. will continue to releaseFormaldehyde, benzene, TVOC (total volatile organic compounds), especially the highest concentration within 3-6 months after the decoration of a new house.For example, low-quality laminate flooring may contain more than 10 times the legal limit of formaldehyde.Flame retardants and leather treatment agents used in upholstered materials in furniture may also release harmful substances.According to data from the China Indoor Environment Monitoring Center,68% of renovated homes have excessive formaldehyde problems.Choosing E0-grade environmentally friendly boards, water-based paint and opening windows for ventilation are effective countermeasures.

Biological contamination: the hidden dangers of moisture and insufficient cleaning

Moist environment is easy to breedMold, dust mites, bacteria, especially bathroom, kitchen and air conditioning filters are the hardest hit areas.Mold spores can trigger asthma and allergies, and dust mite excrement is the main cause of allergic rhinitis in children.U.S. EPA research shows that50% of homes have mold contamination.Regularly cleaning bedding, using a dehumidifier, and replacing air conditioning filters can significantly reduce the risk.Some air purifiers (such as the IQAir HealthPro series) can effectively filter microorganisms.

Physical and Radioactive Contamination: Details That Are Easily Overlooked

Cooking fumes, second-hand smoke, etc.PM2.5The concentration in a confined space can reach 10 times that of outdoors.Natural marble and granite may be releasedRadon gas(Level 1 carcinogen), especially in basements.The China Institute of Radiation Protection pointed out that,Radon gas contributes 10% to lung cancer risk.Using range hoods, banning smoking, and detecting radioactivity of stone materials are necessary means.Some building materials brands (such as Dongpeng Ceramics) have launched low-radioactive products.

Comprehensive management and long-term protection

To deal with indoor pollutionCombination of “prevention + treatment”: Before decoration, choose environmentally friendly materials (such as Shengxiang Flooring F4 star standard), perform regular testing after moving in (Japanese Riken formaldehyde detector is recommended), and match the fresh air system (such as Yuanda SG500) and green plants (Monstera, Pothos).Tsinghua University Building Environment Testing Center emphasizes that,Continuous ventilation is more effective than short-term purification.Consumers should be wary of exaggerated propaganda such as "zero formaldehyde" and refer to the national standard GB/T 18883-2022 for scientific management.

Citing sources

1. China Indoor Environment Monitoring Center's "2021 China Indoor Air Pollution White Paper"
2. U.S. Environmental Protection Agency (EPA) "Guidelines for Indoor Mold Prevention and Control"
3. Tsinghua University Building Environment Testing Center "Technical Specifications for Residential Ventilation"
4. Product examples: Shengxiang flooring (F4 star environmental protection standard), Yuanda fresh air system (SG500 model)