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Pre-Retrofit Assessment of Existing HVAC Systems

Information guide describing considerations for before retrofitting HVAC systems, retrofit scope considerations, and HVAC system replacement options.

Jump Ducts

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.

Sealed and Insulated Flex Ducts

Guide describing how to air seal and insulate flex ducts.

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.

No Ducts or Air Handlers Located in Garage

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.

Condensing HVAC has Corrosion-Resistant Condensate Drain Pan

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

No Excessive Coiled or Looped Flex Ducts

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

Rooms Containing Fuel-Burning Appliances - Code Compliance Brief

An entirely new section in the 2015 IECC/IRC regarding fuel-burning appliances basically requires the appliance to be isolated from the building thermal envelope, located either outside or within a separate room if the fuel-burning appliance is supplied by open combustion air ducts. This brief provides an overview of the requirements and further details of approving the actual "room".

Direct Vent Equipment

Guide describing categories of direct-vent combustion space- and water-heating equipment and combustion safety testing.

Ductless (Mini-Split) Heat Pumps

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

Traditional Split Heat Pumps

Guide describing the split system heat pumps used for central forced air heating and cooling.

Condensing Boilers

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

Oil-Fired Boilers

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

Combustion Furnaces

Guide describing combustion furnaces with selection and installation guidance.

Gas-Fired Boilers

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