Marley AWH4404 Qmark Electric Architectural Wall Heater An 18 gauge steel front cover and aluminum trim frame provides damage resistance with an attractive appearance An integral, tamper-resistant thermostat is standard simplifying installation The totally enclosed, permanently lubricated fan motor provides a maintenance free long life Standard controls include a disconnect switch, over-temperature protector and a fan control that prevents circulation of cold air The unit can be recessed in a standard 2' x 4" wall