PATH - A Public Private Partnership for Advancing Housing Technology

Code Considerations

Indoor Air Quality

The 2003 and 2006 International Residential Codes (IRC) specify that habitable rooms receive natural ventilation from outdoor air through windows, louvers, or doors with operable area that is a minimum of 4 percent of the floor area. Otherwise, a mechanical system providing 0.35 air changes per hour or 15 cubic feet per minute (cfm) per person may be substituted (per section R303.1 of the IRC) . Lavatories must have an operative window or ventilation of 50 cfm intermittent or 20 cfm continuously (per section R303.3 of the IRC) .

Jurisdictions that have adopted the International Mechanical Code of 2003 or a later version may require that newly-constructed kitchens be ventilated with outdoor air at a rate of 100 cfm intermittently or 25 cfm continuously.

Content updated on 7/10/2007

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