The Quartz series gas fireplaces have the features you need with the options you want. Customize for the fireplace that fits into your life. The shallow depth takes less of your living space which makes ambiance accessible to all, while the versatile interior can be changed from traditional to contemporary to fit your style. Includes: 15,000 - 21,000 Btu/Hour Input (NG) Glowing embers 14,000 - 18,500 Btu/Hour Input (LP) Battery backup 5" x 8" rear vent collar Junction box 4" x 6 5/8" top vent collar 12' control wire 8 ceramic fiber logs Convertible to contemporary Full firescreen front and hood IntelliFire ignition Tempered glass Gas flex connector Framing: 32" - 37W x 34.75H x 16.25D 36" - 42W x 38.25H x 16.25D Viewing Area: 32" - 27.25 x 18 36" - 32 x 21.5