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

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

Guide describing air-sealing of the seams and holes in HVAC air handler and furnace cabinets.

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 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 how to upgrade or expand an existing HVAC system.

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

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

Guide describing a method for taking accurate measurements of airflow in mechanical ventilation ducts.

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

Guide describing the retrofit of kitchen exhaust systems, including duct sizing and routing considerations.

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).