BASC Search | Building America Solution Center

Right – Flex duct is mastic sealed at junction box

Image

Right – Metal or fiberboard duct is mastic sealed at seams

Image

Still Placing Ducts in the Attic? Consider Burying Them

Reference

Information sheet about buried ducts.

Kitchen Exhaust Retrofit Duct Guide

Guide

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

Raised ceiling duct chase installation technique

Image

Measure Guideline: Buried and/or Encapsulated Ducts

Reference

Project discussing buried or encapsulated ducts and their pros and cons.

Design Options for Locating Ducts within Conditioned Space

Presentation

Presentation with technical training covering several possible approaches to locating ducts within the home’s air and thermal barriers, and then dig into design considerations and details for the spray foam encapsulation approach.

Technology Solutions Case Study: Buried and Encapsulated Ducts, Jacksonville, Florida

Case Study

Case study describing how using buried and/or encapsulated ducts can reduce duct thermal losses in existing homes.

Wrong: Duct is hung between truss members by strapping and not buried

Image

Removing Construction Debris from Ducts

Guide

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.

The tape is covered with mastic to ensure an airtight seal between the duct and the fitting

Image

Energy Code - Module 7: Ducts, HVAC, Hot Water, and Lighting

Presentation

Webinar that will explain mandatory and prescriptive requirements related to duct installation, insulation, sealing, and testing, as well as requirements for heating, cooling, and hot water systems and controls.

Duct boots and other ceiling penetrations are air-sealed using spray foam

Image

Technology Solutions Case Study: Duct Sealing Using Injected Spray Sealant

Case Study

Case study describing the most cost-effective ways to reduce duct leakage in low-rise housing units.

Insulated floor above garage - cavity insulation with 1 inch rigid insulation with 2x2 wood furring

CAD File

Right: Ductwork is installed in direct contact with lower truss cords. In this picture the main trunk is laying on the truss cords and branch ducts are temporarily held with strapping across truss cords. Ducts are well sealed with mastic

Image

Fiberglass duct board typically comes in sheets 4 foot wide by 10 foot long

Image

Measure Guideline: Reducing Thermal Losses and Gains With Buried and Encapsulated Ducts in Hot-Humid Climates

Reference

Document covering the technical aspects of buried and insulated ducts (BEDs), as well as the advantages, disadvantages, and risks of BEDs compared to alternative strategies.