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

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

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

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

Guide describing the practice of burying HVAC ducts in loose-fill insulation on the attic floor.

Guide describing approaches to burying 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 in 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, increasing the R-value of duct insulation, mitigating condensation issues, and reducing air leakage.

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

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

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

Information guide describing options to consider when retrofitting or upgrading a home's HVAC system.

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.

HVAC

Air Seal HVAC Cabinet Seams

Air Sealing Duct and Flue Shafts

Back-Draft Dampers at Shared Common Exhaust Duct

Building Cavities Not Used as Supply or Return Ducts

Compact Air Distribution

Designing and Installing Mechanical Ventilation Systems to Enable Airflow Testing

Duct Leakage Testing for Central Exhaust and Ventilation Systems in Multifamily Buildings

Duct Leakage Tests

Ducted Returns

Ducts Buried in Attic Insulation

Ducts Buried in Attic Insulation and Encapsulated

Ducts in Dropped Ceilings

Ducts in Interstitial Floor Framing

Ducts in Raised Ceiling Sections

Encapsulated Ducts

Existing HVAC System Upgrade or Expansion

HVAC Ducts Shall Not Be Run within Exterior Walls

Injected Spray Sealant for Existing HVAC Ducts

No Ducts or Air Handlers Located in Garage

No Excessive Coiled or Looped Flex Ducts

No Kinks or Sharp Bends in Flex Duct Installation

Pre-Retrofit Assessment of Existing HVAC Systems

Quantity and Location of Supply and Return Duct Terminals Match Contractor Balancing Report

Removing Construction Debris from Ducts

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HVAC