Builders and RE Agents will occasionally be approached by a customer who has indoor air quality as a main concern. Today there are affordable & effective methods to get good air quality in a home.One of the first things to look at is the flooring surfaces in the home. Carpets are breeding grounds for dirty air. Hard surface floors are much better and dirt is obvious when it is present. Hard surface floors will generally outlast most carpets.
The products used within a home should be chosen so as to limit the amount of toxins to get released in the building. Particle boards, underlayments, paints and adhesives can slowly release toxins. Radon is also an issue, especially here in SW Washington. Sealing the home to prevent ground vapors can greatly reduce the amount of radon that gets into the house.
There are also some good ventilation systems that not only filter the air but they also recover energy from the exhausted air. See this website http://www.ultimateair.com/ for more information. These are known as HRV and ERV systems. Heat & energy recovery ventilators. the better ones have options to have a good filter included.
There is a pretty good IAQ certification program out there to. It is called Indoor Air Plus. Getting this certification on a home could go a long ways to get a quick sale from that customer concerned about IAQ!
Any other good suggestions out there?