Indoor Air Quality

Indoor air quality (IAQ) or indoor environmental quality

During and following construction, there are many ways to improve the air quality for the health of occupants. These include:

  • Exterior grilles or fixed mats at building entrances
  • Framing – Less than 19 percent moisture content before drywall
  • HVAC
    • Supply registers covered during construction
    • Equipment properly sized and commissioned per ACCA Manual S
      • Minimum efficiency of 90 percent
      • Duct work sealed with mastic
      • Installed in the conditioned space
      • Heat recovery ventilator (HRV) for fresh air intake
    • Air filter ≥ MERV 8 with verification that system can accommodate the greater pressure drop
    • Ductless heat pump or ground source heat pump
  • Spot ventilation vented to outdoors
    • Bathrooms
    • Clothes dryers
    • Kitchen exhaust units/range hoods
  • Reduced VOC emissions levels in accordance with CDPH 01350
    • Hard surface flooring
    • Wall coverings
    • Insulation formaldehyde
    • Adhesives and sealants
    • Site applied architectural coatings
  • Cabinets – No added formaldehyde and zero to low-VOC finishes
  • Carpeting, including padding and adhesives, has reduced VOC emission levels as certified by a third party, such as the Carpet and Rug Institute’s Green Label Plus Indoor Air Quality Program
  • Carbon monoxide detector
  • Central vacuum system
  • Combustion Appliance Zone (CAZ) pressure test
  • Radon control systems
    • Active for EPA Zone 1
    • Passive for EPA Zone 2
  • Garage – detached if possible or tightly sealed and gasketed

For more information:
EPA’s Indoor airPlus