Mechanical · M-D7S7P

Unit Heater - Gas Fired (Gravity Vent)

Materials

Elements

Beams Walls Roofs Decks Waterproofing / Flashing Insulation Connections / Plates Roof / Floor Openings

About this detail

A gas-fired unit heater is suspended below a metal deck and joist top chord using threaded rods and structural angle iron. The natural gas supply line includes a full port gas ball valve, a sediment trap tee, a union, a pressure regulator with a vented screen, and a flexible connection leading into the unit. Flue venting consists of a single-wall copper vent pipe transitioning to an Underwriters Laboratories listed double-wall type 'B' vent pipe extending through the roof assembly. Roof penetration flashings include a galvanized roof flashing provided by the mechanical contractor, a membrane flashing and draw band by the roofing contractor, silicone sealant, and a termination cap.

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