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Guide describing how to air seal and insulate flex ducts.

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

Guide describing how to air seal and insulate fiber board ducts.

Guide describing method for installing ducts in a duct chase in a dropped ceiling.

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

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 method for designing and installing ducts in a raised ceiling chase.

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

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

Guide describing how to install a bathroom exhaust fan to remove excess moisture.

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

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

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 use of building cavities as supply or return 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 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 methods for providing space cooling and refrigeration during extreme heat events and/or power outages.

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

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

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 install a corrosion-resistant drain pan in condensate-producing HVAC equipment.

Guide describing combustion furnaces with selection and installation guidance.

Guide describing how to improve boiler efficiency in multifamily central hydronic heating systems by installing thermostatically controlled radiator valves (TRV) to reduce temperatures in overheated spaces.

Guide describing how to conduct duct leakage tests per RESNET protocols on all components of the HVAC system (including the air handler, ductwork, register boxes/boots, and all air devices such as diffusers, registers, or grilles).

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

Guide describing sizing methods for cold climate heat pumps.

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