Deluxe models feature Empire's Contour tube-style burner, designed to complement the hand-painted ceramic fiber log set, and produce a natural dancing flame.Contour Burner, Ceramic Fiber Log Set, and Tempered Glass Compact design (just 16 inches deep) No louvers (but still allows optional blower) Heater Rated up to 83% Steady State Efficiency Remote-Ready Millivolt BlowerAir Shutter Opening (LP): 5 16 Air Shutter Opening (N): 3 16 BTU: 18,000 - 25,000 Depth: 16-3 8 Fuel Types: Liquid Propane, Natural Gas Gas Inlet Shutoff Valve (Pipe): 1 2 NPT Height without standoff: 34-3 4 Ignition Types: Millivolt KWH: 5.3 - 7.3 Weight: 130 Width: 43Consult your local building code agency, prior to installation, to ensure compliance with local codes-including permits and inspections.