Dimplex AC45N 3375/4500-Watt Electric Downflow Heater Electric down-flow heater for use over single doorways or drive-through windows Full-heat or half-heat modes; fan-only option; on-board controls; adjustable air flow Easy-access junction box; wire-stitched heating element for instant response; quiet fan 2 power-interrupt safety cut-outs; multi-function brackets included for easy installation Measures 23-4/5 by 4-3/4 by 8-3/8 inches; 1-year limited warranty