Knauf Insulation Air Duct Fabrication Manual for 1", 1-1/2", and 2" Author(s) Knauf Organization(s) Knauf Publication Date January, 2021 Description Website providing information about Knauf Insulation.
Image If HVAC duct must be installed in an exterior wall, separate it from the exterior with at least R-6 of continuous rigid insulation
Image 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 Shall Not Be Run within Exterior Walls Description Guide describing the use of building cavities as supply or return ducts.
Batt Insulation for Existing Vented Attics Description Guide describing how to increase insulation in existing homes by installing batt insulation on the ceiling plane of a vented attic.
