HVAC in the Crawl Space
In many cases, your vented, unconditioned crawl space is home to HVAC equipment. Duct lines are leaky and typically have gaps or holes, in an unconditioned environment, these gaps and holes allow dust, dirt, and allergens to get into the ductwork and your home. By encapsulating the crawl space you are bringing the ductwork into the conditioned space and reducing the allergens and pollutants getting into the lines, therefore improving your indoor air quality.