Heater and wall furnace rated. 35,000 BTU's in natural gas or propane and 78% steady state maximum efficiency. "Yellow Dancing Flame®" burner system. Heat and flame adjustable. Compact, easily accessible, and user-friendly controls. Equipped with 100% safety shut off feature for your peace of mind. Heat transferring, high heat ceramic glass. Clear, 230 sq. inches of viewing area - 19 1/4" 21 1/4". President's Limited Lifetime Warranty. Front and trivit sold separately.