New inspection article: Building Cavities Used as Supply or Return Ducts

Although it’s common practice to use various building cavities within a house as supply- and return-air ducts, this can actually cause an HVAC system to work harder because these seemingly convenient locations are notoriously prone to leaks.  Learn how this happens and what to advise your clients, especially those building new homes, in our new article:  Building Cavities Used as Supply or Return Ducts.