Guides A-Z

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

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

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

Guide describing sizing methods for cold climate heat pumps.

Guide describing combustion furnaces with selection and installation guidance.

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

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

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 how to conduct duct leakage tests 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 how to install ducted returns in bedroom walls to balance air pressures between rooms and to enable stale air to return to a central heating system's air handler for reconditioning even when room doors are closed.

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

Guide describing the use of electronically commutated motors (ECMs) in HVAC central air handler fans to reduce power consumption compared to a single-stage fan motor.

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

Guide describing how to upgrade or expand an existing HVAC system.

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

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

Guide describing sizing and installation of foundation heat exchangers, which can be connected to a heat pump system used for spacing conditioning as well as domestic water heating.

Guide describing ground-source (geothermal) heat pumps including an overview of technology and guidance on compliance and installation.

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

Guide describing installation procedures for combined space and water heating systems.

Guide describing how to install jump ducts in bedroom walls to balance air pressures between rooms, enabling constant air flow for conditioning and freshness even when room doors are closed.

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

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

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

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

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

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

Guide describing how to air seal and insulate flex ducts.

Guide describing how to air seal and insulate metal ducts.

Guide describing best practice venting strategies for existing steam heating systems in multifamily buildings.

This measure guide describes how to correctly install ducts, ensuring enough cavity space to avoid compression.

Guide describing how to hang ducts with supporting straps or saddles to adequately support ducts so they do not sag and are not pinched or compressed in a manner that would cause damage to the ducts, the duct insulation, or the duct air barrier covering.

Guide describing how to analyze boiler and building performance and install thermostatic radiator valves (TRV) to reduce temperatures in over heated spaces.

Guide describing how to conduct duct leakage tests per RESNET protocols.

Guide describing the split system heat pumps used for central forced air 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's air handler for reconditioning even when room doors are closed.

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's air handler for reconditioning even when room doors are closed.

This guide presents central and individual dwelling unit ventilation and exhaust strategies for multifamily construction.

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

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