Commercial-grade 20-gauge cold rolled front cover and brackets allow heater to withstand rigors of commercial applications Chimney-fin element designed for maximum air circulation Air flow directed away from walls to help prevent wall streaking Steel-sheathed heating element combines the durability of a steel tubular heater with the excellent heat transfer characteristics of aluminum fins Ideal for basic, zoned primary/secondary heating Built-in wire-way facilitates end-to-end installation of continuous-run heaters Large, pre-wired junction boxes at each end are provided with knockouts in the rear, bottom, inside and outside High temperature safety limit Pre-notched marks for mounting guide UL-listed for installation flush to any wall and flat on any floor type No fans; convection heat minimizes air flow, reducing flow of bacteria and dust