Mechanical · M-9GA5Q

Duct Through Exterior Wall Detail

Materials

Elements

Walls Doors Arches Waterproofing / Flashing Drainage Connections / Plates Reinforcing Roof / Floor Openings

About this detail

A sheet metal duct passes through an exterior wall assembly, sealed with flashing and perimeter caulking to maintain the building envelope. A weatherproof louver with a birdscreen connects to a duct sleeve and plenum, with a minimum thirty-six-inch plenum depth unless otherwise noted. The plenum incorporates a drain pan at least eight inches tall, pitched toward the outside at a minimum of one-half inch per lineal foot, with unsealed bottom edges to prevent trapping moisture against the pan. A flexible duct connector provides a thermal break, and the building air barrier wraps directly into the duct sleeve to create an airtight seal.

NOTES: 1. COORDINATE LOUVER SIZE & LOCATION W/ARCHITECTURAL PLANS AND EXTERIOR ELEVATIONS. 2. PLENUM HEIGHT AND WIDTH SHALL MATCH LOUVER HEIGHT AND WIDTH UNLESS NOTED OTHERWISE. 3. PLENUM SHALL BE A MINIMUM OF 36" DEEP UNLESS OTHERWISE NOTED. 4. DUCT SLEEVE SHALL BE INSTALLED PRIOR TO LOUVER AND DRAIN PAN INSTALLATION. 5. WRAP BUILDING AIR BARRIER INTO DUCT SLEEVE FOR AIR TIGHT SEAL. 6. PROVIDE DAMPERS AS REQUIRED PER PLANS AND SPECS. 7. PROVIDE DUCT SLEEVE TO PLENUM FLANGE AS REQUIRED FOR INSTALLATION OF LOUVER ANGLES AND FASTENERS FROM INSIDE THE BUILDING. [IF PLENUM DEPTH IS SHORT ENOUGH TO ALLOW FOR ANGLE AND FASTENER INSTALLATION, DUCT SLEEVE AND PLENUM CAN BE ONE PIECE.] 8. [FASTENERS SHALL NOT BE INSTALLED THROUGH DRAIN PAN.] 9. [DO NOT SEAL BOTTOM OF LOUVER TO DRAIN PAN. DRAIN PAN SHALL BE SEALED TO DUCT SLEEVE.] SEE ARCH DWGS FOR MOUNTING DETAIL WEATHERPROOF LOUVER DRAIN PAN. [MINIMUM 8" TALL]. CAULK AND WATER PROOF PAN PENETRATIONS. ACCESS DOOR HALF HEIGHT OF DUCT, 12"x12" MIN (UNLESS OTHERWISE NOTED ON PLANS) PLENUM DEPTH (NOTE 3) INSULATE PLENUM PER SPEC. SLEEVE/PLENUM FLANGE ARCHITECTURAL FLASHING/DRAIN PAN EXTERIOR WALL CAULK AND SEAL AROUND TOP AND SIDES OF LOUVER BIRDSCREEN DUCT SLEEVE ANGLES AND FASTENERS (TYP) CAULK AND SEAL AT CONNECTION POINT DUCT SLEEVE FOR LOUVER TO PLENUM CONNECTION LOUVER DRAIN PAN PITCH BOTTOM OF PLENUM TO OUTSIDE, 1/2" PER LINEAL FOOT MIN DUCT FLEX CONNECTOR FOR THERMAL BREAK. ARCHITECURAL FLASHING BUILDING AIR BARRIER TO DUCT SLEEVE TIE IN DUCT PLENUM BUILDING AIR BARRIER TO DUCT SLEEVE TIE IN CAULK AND SEAL AT CONNECTION POINT BUILDING AIR BARRIER DUCT PLENUM DUCT SLEEVE FOR LOUVER TO PLENUM CONNECTION [CAULK AND SEAL AT CONNECTION POINT] [CAULK AND SEAL BOTTOM OF LOUVER] [MINIMUM 18" DRAIN PAN DEPTH] SHEET METAL ANGLE RING (MIN. 22 GA.) SECURE TO SLEEVE. (TYP) WALL FRAMING SEE ARCHITECTURAL PLANS FOR WALL DETAILS SEAL PERIMETER OF PENETRATION WITH SEALANT AT SHEET METAL ANGLE. INTERIOR WALL EXTERIOR WALL FACE SEAL TOP OF COUNTER FLASHING TO EXTERIOR WALL FACE COUNTER FLASHING, REFER TO ARCHITECTURAL DETAILS SHEET METAL FLANGE (TYP) SEAL PERIMETER OF PENETRATION WEATHER TIGHT AT SHEET METAL FLANGE (TYP). SHEET METAL DUCT DUCT LINER PER THE ENERGY CODE

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