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

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

Guide describing how to air seal and insulate flex ducts.

Guide describing how to air seal and insulate fiber board 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 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 air-sealing of the seams and holes in HVAC air handler and furnace cabinets.

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 a bathroom exhaust fan to remove excess moisture.

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

Guide describing proper sizing and installation of high-MERV furnace and air-handler filters.

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

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 the uses, selection process, and specification of high-MERV filters.

Guide describing airflow control strategies for elevator shafts, corridors, stairwells, and trash chutes in multifamily buildings.

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

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

Guide describing best practices for testing and commissioning heat pump systems using smart tools during and after installation.

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

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

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