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If HVAC duct must be installed in an exterior wall, separate it from the exterior with at least R-6 of continuous rigid insulation

HVAC ducts, cavities used as ducts, and combustion inlets and outlets may pass perpendicularly through exterior walls but shall not be run within exterior walls unless at least R-6 continuous insulation is provided on exterior side of the cavity

HVAC ducts, cavities used as ducts, and combustion inlets and outlets may pass perpendicularly through exterior walls but shall not be run within exterior walls unless at least R-6 continuous insulation is provided on exterior side of the cavity

Ducts in Dropped Ceilings

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

HVAC Ducts Shall Not Be Run within Exterior Walls

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

No insulation installed in cavity and not air sealed

No insulation installed in cavity and not air sealed

Inadequate amount of insulation installed with compression, misalignment, and voids

Inadequate amount of insulation installed with compression, misalignment, and voids

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

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

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.