Keystone B - Vent Fireplaces combine modern technology with traditional venting to create the appearance and performance of a conventional fireplace but with the convenience of gas. Arch Doors Require Arch Hinge Frame. Rectangle Doors Require Rectangle Hinge Frame.Proudly Made In USADepth: 18 Framing Dimensions: 39.38 x 37.75 x 18 Height: 24.88 Height: 37.75 Ignition System: Standing Pilot Oiezo Input BTU: 25,000 Iron Pipe Size (N.P.T.): 0.38 Max Wieght (lp): 121 Type of Gas (State on Order): Natural or LP Vent Size (Inches): 6 Width: 36 Width: 39.38{Product Features Hem - bent seams that provide a better seal while eliminating dozens of screws and fasteners, resulting in a lighter, more rigid box thats easier to install 25,000 BTU burner Hand - painted ceramic fiber Log Set Available control options for millivolt models only (sold separately) All parts carry a 3 - year limited warranty {Product Includes Junction box included with louvered fireplaces only Conversion kit included with 120 - V direct ignition models only (Conversion kit for millivolt models must be purchased separately) Matte black slat louvers (except flush front models)Cabinet, trim kits, and decorative doors sold separately Fireplaces and Fireboxes may be cancelled but are not returnable