BASC Search

Ducts Buried in Attic Insulation and Encapsulated

Guide describing approaches to burying and encapsulating ducts in unconditioned attics to increase the overall R-value of duct insulation.

Spray foam insulates and air seals the underside of the attic roof and walls.

Publication Date

Thu, 09/01/2011 - 12:00

Right – Spray foam air seals and insulates the walls including the walls behind the fireplace and covers the underside of the roof deck of this mixed-dry climate home to provide an insulated attic space for HVAC ducts.

Publication Date

Thu, 09/30/2021 - 12:00

Wrong: open wall cavity connected to this return air plenum is allowing cellulose attic insulation to be pulled into the furnace

Publication Date

Sun, 06/01/2014 - 12:00

Ducts in Raised Ceiling Sections

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

Encapsulated Ducts

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.

Support at Intervals for Flex Ducts

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.

Burried and encapsulated ducts in a ceiling plane

Publication Date

Fri, 02/01/2013 - 12:00

Right - Open-cell polyurethane spray foam to R-28 on underside of roof turns new attic into conditioned space for HVAC.

DOE ZERH HIA 2013 Case Study: Preferred Builders, Old Greenwich, Connecticut

Author(s)

Pacific Northwest National Laboratory,

U.S. Department of Energy

Organization(s)

PNNL,

DOE

Publication Date

April, 2013

Case study describing a DOE Zero Energy Ready Home 2013 Housing Innovation Award Winner in Old Greenwich CT, that scored HERS 42 without PV and HERS 20 with PV.

Building Cavities Not Used as Supply or Return Ducts

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

Measure Guideline: Buried and/or Encapsulated Ducts

Author(s)

Mantha Pallavi,

Zoeller William,

Shapiro Carl

Organization(s)

U.S. Department of Energy,

DOE

Publication Date

August, 2013

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

Ducts in Dropped Ceilings

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

Field Evaluation of Four Novel Roof Designs for Energy-Efficient Manufactured Homes

Author(s)

Dentz Jordan,

Ansanelli Eric,

Dadia D,

Levy Emanuel,

Barker Greg M,

Rath Pournamasi

Organization(s)

Advanced Residential Integrated Energy Solutions,

ARIES

Publication Date

December, 2015

Report of a field evaluation of four novel roof designs to see how each design would reduce space-conditioned energy use so that the knowledge gained could be applied to the design of new manufactured homes.

Existing Whole-House Solutions Case Study: Deep Energy Retrofit in the Pacific Northwest

Author(s)

Pacific Northwest National Laboratory

Organization(s)

PNNL

Publication Date

December, 2011

Case study describing a whole-house, deep energy retrofit project in the marine climate.

Ducts Buried in Attic Insulation and Encapsulated

Spray foam insulates and air seals the underside of the attic roof and walls.

Right – Spray foam air seals and insulates the walls including the walls behind the fireplace and covers the underside of the roof deck of this mixed-dry climate home to provide an insulated attic space for HVAC ducts.

Wrong: open wall cavity connected to this return air plenum is allowing cellulose attic insulation to be pulled into the furnace

Ducts in Raised Ceiling Sections

Encapsulated Ducts

Support at Intervals for Flex Ducts

Burried and encapsulated ducts in a ceiling plane

Right - Open-cell polyurethane spray foam to R-28 on underside of roof turns new attic into conditioned space for HVAC.

DOE ZERH HIA 2013 Case Study: Preferred Builders, Old Greenwich, Connecticut

Building Cavities Not Used as Supply or Return Ducts

Measure Guideline: Buried and/or Encapsulated Ducts

Ducts in Dropped Ceilings

Field Evaluation of Four Novel Roof Designs for Energy-Efficient Manufactured Homes

Existing Whole-House Solutions Case Study: Deep Energy Retrofit in the Pacific Northwest

Attic Ventilation Fans

Air Seal HVAC Cabinet Seams

Whole House Ventilation Strategies for Existing Homes