40 000 BTU output keeps guests warm on cold nights Stainless steel burner for reliability against the elements Electronic ignition makes the firepit easy to light Thermocouple safety device shuts off gas flow if flame goes out Specifications . Size 45 in . BTU 40 000 BTU. Burner Style Stainless Steel. Control Type Turn Knob. Frame Material Aluminum. Material Aluminum. Number Of Doors 1. Overheat Protection No. Rust Resistant Yes. Zero Clearance No. BTU Output 40000. Fuel Type Liquid Propane. Heating Area 15 sq ft