Guides A-Z

This guide describes sizing methods for cold climate heat pumps. It is assumed that the reader already has a basic understanding of HVAC systems and heating and cooling load calculations. Consider reading the “ Traditional Split Heat Pumps” and “ Ductless (Mini-Split) Heat Pumps” guides for...

Guide describing how to provide combustion air for fireplaces and how to test fireplaces for combustion safety.

Guide describing how to design HVAC systems to be located within the conditioned space of the home, either in a utility closet or in an air sealed conditioned attic, basement, or crawl space.

This guide describes how to install a whole-building ventilation system to provide adequate dilution of indoor air contaminants.