New home VOCs; 老房子對健康有利； 現在很多裝修導致病

When moving into a newly constructed home, it's important to be aware of off-gassing, the process by which materials release volatile organic compounds (VOCs) and other chemicals into the air. These emissions can affect indoor air quality and potentially impact health.uHoo | Clean Air for All+2GQ+2

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Common Sources of Off-Gassing in New Homes

Several materials and products commonly found in new homes can emit VOCs:

• Paints, Varnishes, and Sealants: Contain solvents that release VOCs during and after application.

• Flooring Materials: Vinyl, laminate, and certain carpets often use adhesives and finishes that off-gas chemicals like formaldehyde and benzene.

• Furniture and Upholstery: New items, especially those made from pressed wood, can release formaldehyde and other VOCs.

• Cleaning Products and Air Fresheners: Many contain chemicals that can contribute to indoor air pollution.

• Mattresses and Bedding: Some contain flame retardants and other chemicals that can off-gas, particularly when exposed to body heat. uHoo | Clean Air for AllThe Guardian

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? Health Implications of Off-Gassing

Exposure to VOCs can lead to various health issues:Atmotube+16MN Dept. of Health+16robertbrucecarter.com+16

• Short-Term Effects: Headaches, dizziness, eye, nose, and throat irritation, nausea, and allergic reactions.

• Long-Term Risks: Prolonged exposure may contribute to respiratory problems, neurological disorders, and certain cancers. uHoo | Clean Air for All

Certain groups, such as infants, children, and individuals with respiratory conditions, may be more susceptible to these effects.

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1. Vinyl Flooring (PVC)

• Chemicals Released: Phthalates (plasticizers), VOCs like formaldehyde, and sometimes heavy metals.

• Why: PVC is softened with chemicals to make it flexible, and adhesives used during installation can also emit VOCs.

• Off-Gassing Duration: Weeks to months, sometimes longer in poorly ventilated areas.

• Mitigation:

  • Choose phthalate-free or low-VOC vinyl.

  • Ventilate well for the first few months.

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2. Laminate Flooring

• Chemicals Released: Formaldehyde from particleboard cores, adhesives, and finishes.

• Why: Laminate is often made from composite wood with a plastic overlay. The resins and glues can off-gas over time.

• Off-Gassing Duration: Can last several months to a year.

• Mitigation:

  • Look for CARB Phase 2 compliant or E0/E1 formaldehyde-rated products.

  • Allow boards to acclimate in the home before installation.

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3. Engineered Hardwood

• Chemicals Released: VOCs from adhesives, finishes, and sometimes sealants.

• Why: Layers of wood are bonded with glues; surface finishes like polyurethane also off-gas.

• Off-Gassing Duration: Several weeks after installation; finishing can extend it.

• Mitigation:

  • Prefer low-VOC or water-based finishes.

  • Ventilate thoroughly after installation.

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4. Carpet and Carpet Padding

• Chemicals Released: VOCs from backing, adhesives, flame retardants, and sometimes dyes.

• Why: Synthetic fibers and backing glues release formaldehyde and other VOCs.

• Off-Gassing Duration: Can last weeks to months.

• Mitigation:

  • Choose low-VOC, natural fiber carpets.

  • Wash or vacuum frequently.

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5. Adhesives and Sealants

• Chemicals Released: Solvents like toluene, xylene, formaldehyde.

• Why: Used to glue tiles, laminate, vinyl, and engineered hardwood.

• Off-Gassing Duration: Days to weeks, depending on product and ventilation.

• Mitigation:

  • Use low-VOC or water-based adhesives.

  • Ensure proper ventilation during and after installation.