WAP technology has advanced to the point where dwellings are being sealed tighter than ever before. In accordance with the “house-as-a-system” approach to weatherization, there can be existing indoor air quality conditions that may be intensified by current air sealing techniques.   Indoor air quality problems may have existed before weatherization, but not been realized because there were significant air changes in the home.

Combustion appliances can be the source of problems that should be addressed by WAP.  Related protocols typically include:

• Testing for carbon monoxide and corrective action to reduce to acceptable levels;
• Gas leak detection tests and repairs on gas appliances and supply lines;
• Checking for leaks in oil appliances and supply lines;
• Draft tests and vent inspections and related repairs;
• Testing for backdrafting and potential for flue gases to spill into living space;
• Insuring sufficient combustion air;  and
• Insuring proper clearances from combustible materials.