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

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 ducted returns to return stale air from bedrooms and bathrooms to a central heating system.

Guide describing removal of construction debris from flex ducts and protection of ducts and HVAC equipment during construction to keep them free of dust and debris.

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 how to thoroughly seal HVAC ducts to ensure air delivery without leakage, and to ensure economical and quiet performance of the HVAC system.

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

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

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 how to conduct testing for adequate combustion air in the space where a combustion appliance is located if the appliance is located within the conditioned space of the home.

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

Guide describing how to undercut the doors in bedroom walls to balance air pressures between rooms and to enable stale air to return to a central heating system.

Guide describing requirements and best practices for mechanical garage exhaust in multifamily buildings.

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

A guide describing how to elevate and secure HVAC equipment for protection against floods, earthquakes, and high winds.

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

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

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

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

Guide describing combustion furnaces with selection and installation guidance.

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

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

Guide describing oil-fired boilers and hot water heat distribution systems used for home heating.

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

Guide describing gas-fired boilers and hot water heat distribution systems used for home heating.