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Guide describing how to select and install whole-house ventilation systems for existing homes.

Guide describing the testing of duct leakage in central ventilation systems for multi-story, multi-family buildings.

Guide describing how to hang HVAC ducts with supporting straps or saddles to adequately support ducts so they do not sag and are not pinched or compressed.

Guide describing how to install jump ducts in bedroom walls to balance air pressures between rooms, enabling stale air to return of the central air handler, even when room doors are closed.

Guide describing the use of building cavities as supply or return ducts.

Guide describing how to air seal and insulate flex ducts.

Guide describing design and installation of compact duct systems for central heating and cooling systems.

Guide describing how to air seal and insulate metal ducts.

Guide describing the use of ducted returns to return stale air from bedrooms and bathrooms to a central heating system.

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 attic, basement, or crawl space.

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

Guide describing the repair and reconfiguration of the air handler closet and platform when replacing the air handler.

Guide describing how to correctly install flex ducts without kinks or sharp bends.

Guide describing how to install a corrosion-resistant drain pan in condensate-producing HVAC equipment.

Guide describing how to correctly install flex ducts without excessive coils or loops.

Guide describing how and where to install ducts, to ensure enough cavity space to avoid compression of the flex ducts or duct insulation.

Guide describing the use of building cavities as supply or return ducts.

Guide describing refrigerant-based compression-cooling air conditioning systems for space cooling.

Guide describing how to create a designated shelter-from-heat space in a home to help occupants successfully weather an extreme heat event.

Guide describing categories of direct-vent combustion space- and water-heating equipment and combustion safety testing.

Guide describing the split system heat pumps used for central forced air heating and cooling.

Guide describing ductless heat pump systems used for single-room or whole-house heating and cooling.

Guide describing how to install transfer grilles in bedroom walls to balance air pressures between rooms and to enable stale air to return to a central heating system.

Guide describing condensing boilers and hot water heat distribution systems used for home heating.

This guide describes evaporative cooling technologies which can be used to cool homes in dry climates.