HVAC -

Ducts

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

Guide describing how to air seal duct and flue shafts.

Guide describing how to install back-draft dampers in exhaust fans to make a shared duct possible.

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

Guide describing correct ducting for exhaust fans.

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

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.

This guides describes buried ducts in loose-fill attic insulation, a method that can only be used in dry climates.

This guide describes approaches to buryng and encapsulating ducts in unconditioned attics to increase the overall R-value of duct insulation.

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

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

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

Guide that illustrates how and when to encapsulate ductwork in unconditioned attics, increases the R-value of duct insulation, mitigating condensation issues and reducing air leakage.

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

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

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

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 and to enable stale air to return to a central heating system's air handler for reconditioning even when room doors are closed.

Kitchen exhaust ventilation, properly ducted to the outside, is an essential component of good indoor air quality (Figure 1). Research has identified kitchens as the primary location where most harmful pollutants are generated in the home. During the cooking process, moisture and pollutants are...

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 how to correctly vent a clothes dryer.

Guide describing how to correctly locate duct terminals to meet the ENERGY STAR Certified Homes program.

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 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 how to air seal around duct shafts and flues installed through ceilings, walls and flooring in new and existing homes.

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 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 ventilation air inlets in open locations at a safe distance from potential air contamination sources.

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%.

Guide describing the types of whole-house fans, installation details to reduce energy loss, and how to operate them for comfort and energy savings based on climate zone.