Changes to the building enclosure will have a significant impact on the dynamics of water, air, vapor and heat flow within the home. Upgrades to the mechanical systems will also affect these dynamics Certain measures should be implemented prior to or as part of any DER project to ensure that these changing dynamics do not have negative ramifications for health and safety. These prerequisite measures for DER projects are outlined below. The measures relate to:
The measures described to address indoor air quality include mechanical ventilation and soil gas control. These are, by no means, the only means to ensure good indoor air quality. However, effective mechanical ventilation and soil gas control are essential aspects of the building (as contrasted to furnishings, equipment, materials, etc. that people might bring into a building) that provide the occupants a means to control contaminants and respond to indoor air conditions.