NFPA Exhaust Thimble

Wall and roof thimbles provide transitions where it is necessary to pass exhaust pipe through walls and roofs safely to the outside atmosphere. inExhaust thimbles conform to NFPA 37 and 110.

Before installing, you should obtain the most up to date copies of local codes applicable to Generator Set or other applicable installation. Consult your local building inspector.

Catalog standard thimbles modeled for 8” thick wall and/or flat roofs. Thimble to extend a minimum of 9” on each side of wall or roof.
Installation Guide



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