TPI 3320 Series commercial fan-forced wall heater features a heavy 18 gauge steel housing with an extruded aluminum frame. The unit has a thermal overload cut-off for added safety, a fan delay switch, a built-in tamperproof thermostat calibrated to provide a range of 0 degrees F to 110 degrees F, and a manual disconnect switch. Electric fan-forced air heater quickly heats up the space and provides you with the much-needed warmth. Output power: 1500W of comforting warmth; maximum BTUs: 5120BTU/h. Overheat protection: heater will instantly shut off to prevent overheating. Features built-in single-pole tamperproof thermostat. Powder-coated 18-gauge steel grill with extruded aluminum front frame. Sealed tubular heating element with large parallel steel fins for quick heat transfer. Low-speed 600 rpm four-pole motor drives a vane axial blower to deliver a quiet air downflow at 175 cfm. Equipped with disconnect switch, automatic fan delay circuit, and automatic reset thermal limit. Meets or exceeds ETL Listed Mark standard. Required voltage: 120V (12. 5A). Rough-in dimensions: 19. 5"H x 14. 13"W x 4"D; grill dimensions: 20. 84"H x 15. 91"W. Made in the USA. 1-year manufacturer limited warranty. ⚠ WARNING: This product can expose you to chemicals including nickel which is known to the State of California to cause cancer, and chromium which is known to the State of California to cause birth defects and/or reproductive harm. For information go to www. P65Warnings. ca. gov.