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Sealed and Insulated Flex Ducts

Guide describing how to air seal and insulate flex ducts.

Sealed and Insulated Metal Ducts

Guide describing how to air seal and insulate metal ducts.

Sealed and Insulated Fiber Board Ducts

Guide describing how to air seal and insulate fiber board ducts.

To attach the flex duct to a main trunk duct or any other connection, the flex duct is pulled over the connecting collar at least 2 inches past the raised bead, then the insulation is pulled back

Pull the insulation and outer liner of the flex duct over the collar to come in full contact with the liner and insulation of the trunk line or fitting and tape in place

A nylon draw band and tensioning tool are used to secure the inner coil of the pre-insulated flexible duct

Publication Date

Wed, 11/21/2012 - 12:00

A nylon draw band and tensioning tool are used to secure the inner liner of the pre-insulated flexible duct

When wrapping metal ducts with insulation allow two inches of overlap and staple along the seam with outward clinching staples

Collars that are specifically made for flexible duct have a raised bead to prevent the duct from slipping off

Assembled section of fiber board duct

Publication Date

Fri, 01/11/2013 - 12:00

Compact Buried Ducts in a Hot-Humid Climate House

Author(s)

Mallay David

Organization(s)

Home Innovation Research Labs,

HIRL

Publication Date

January, 2016

Report on heating and cooling air-distribution ducts that are insulated, installed close to the ceiling in a vented attic and covered with attic insulation to minimize energy loss.

Still Placing Ducts in the Attic? Consider Burying Them

Author(s)

Zoeller William

Organization(s)

Consortium for Advanced Residential Buildings,

CARB,

Steven Winter Associates,

SWA

Publication Date

March, 2009

Information sheet about buried 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.

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

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

Seal seams in fiber board ducts with out-clinching staples, UL-181A-approved tape, and mastic

Two pieces of flex duct are spliced together with a metal sleeve, nylon draw bands, mastic, metal tape, and more mastic

Cut fiber board with a red V-groove tool and a gray shiplap tool to create mitered corners and a shiplapped edge for duct sections

Seal all joints and seams in the metal ductwork with mastic before installing insulation

Show Home Targets Energy Efficiency in Hot-Humid Climates

Author(s)

U.S. Department of Energy

Organization(s)

DOE

Publication Date

November, 2004

Case study describing the New American Home project.

GreenCraft Greenspoint House Prototype

Author(s)

Building Science Corporation

Organization(s)

BSC

Publication Date

February, 2009

Case study describing a building project in the mixed-humid climate zone.

Baxter Community - High Performance Green Building

Author(s)

Building Science Corporation

Organization(s)

BSC

Publication Date

February, 2009

Case study describing a building project in the mixed-humid climate zone.

Mercedes Homes: Hot, Humid Climate Region 40+% Energy Savings

Author(s)

Steven Winter Associates

Organization(s)

CARB,

SWA

Publication Date

August, 2009

Case study describing a building project in the hot-humid climate zone.

New Whole-House Solutions Case Study: Heritage Buildings, Inc., and Energy Smart Home Plans, Leland, North Carolina

Author(s)

Pacific Northwest National Laboratory

Organization(s)

PNNL

Publication Date

October, 2012

Case study describing a new construction project in North Carolina.

New Whole-House Solutions Case Study: Project Home Again Phase I

Author(s)

Building Science Corporation

Organization(s)

BSC

Publication Date

February, 2009

Case study describing a building project in the hot-humid climate zone.

New Whole-House Solutions Case Study: Lancaster Live/Work Townhome Prototype

Author(s)

Building Science Corporation

Organization(s)

BSC

Publication Date

April, 2010

Case study describing a building project in the marine climate.

Use only Underwriters Laboratory UL-181 approved tape

Fiber board sheets are available with pre-cut shiplapped ends

After securing the inner coil, cover the draw band and the seam with a generous amount of mastic

Hand tools for cutting fiber board sheets include a knife, straight edge, and color-coded edge-cutting tools

New Whole-House Solutions Case Study: Pine Mountain Builders, Pine Mountain, Georgia

Author(s)

Pacific Northwest National Laboratory

Organization(s)

PNNL

Publication Date

January, 2013

Case study describing a builder in Georgia that designs energy-efficient homes for a green community, yielding homes with HERS scores as lowas 59 and electric bills as low as $50 a month.