HEATCO Flanged and insert duct unit aie heaters have finned tubular sheathed heaters, secured by mounting bushes into a terminal box, where the heaters can be prewired for a specified number of stages if required.
The Flanged type is supplied complete with a robust, rust resistant metal frame and internally insulated with a non combustible material of thermal conductance not greater than 30 Kw / meter square at 100°C, the insert type with a heavy gauge mounting flange.