Acknowledging reports that air quality inside homes can be worse than outside, engineers have identified ways to move air in and out of homes to minimize the factors that lead to indoor air quality problems.
The key is to design HVAC and other systems to work together to effectively ventilate homes and minimize sources of indoor pollution. Houses adhering to guidance from ASHRAE for home ventilation will generally result in increased indoor air quality and decreased health problems compared to those that do not. The guidance is contained in ASHRAE Standard 62.2, Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings, is the only nationally recognized indoor air quality standard developed solely for residences. It is intended for use in building codes.