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 for designing and installing interior ducts in an interstitial floor cavity in new and existing homes.

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.

Guide describing how to install ventilation air inlets in open locations at a safe distance from potential air contamination sources.

Guide describing options for adding dehumidification equipment to a home to maintain indoor relative humidity below 60%.

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