From the curve of each log to the height of the stack, your White Mountain Hearth Log Set is crafted to complement the burner pattern and produce a lifelike fire. Flames dance and swirl to captivate your imagination and warm your soul. Complete the illusion with one of Empire's optional Ember Bed Kits and Platinum Glowing Embers. Unlike a wood fire, your White Mountain Hearth vent - free logs create a consistent, controlled heat - without dangerous flare - ups or chilling die - downs. Empire's vent - free gas logs warm your room quickly and efficiently, while using about half the energy of a traditional vented gas log. For people who have grown tired of hauling in logs, hauling out ash, and living with uneven heating, White Mountain Hearth logs are the perfect replacement in a traditional fireplace. White Mountain Hearth vented ventfree burners do not require a flue. Originally designed for use in ventfree fireplaces, these burners work equally well in traditional flue - vented applications. They can be ordered for use with natural gas or LP. Vent-free burners come in LP and Natural Gas. All vent-free burners include an Oxygen Depletion Sensor (ODS) to instantly shut off the system if oxygen in the room drops to unsafe levels. The new Vent-Free Intermittent Pilot systems eliminate the standing pilot for even greater fuel savings. IP systems include a thermostat remote control and must be installed in Vent-Free applications only.24 Log Set 4-Piece Burner BTU input 36,000 Includes Thermostat Remote Control All Parts carry a 5-year limited warranty with a 5-year limited labor warranty Proudly Made In USABTUs: 36000 Minimum Firebox Depth: 14 Minimum Firebox Front Width: 30 Minimum Firebox Height: 18 Minimum Firebox Rear Width: 23 Size: 24 Style: Single Sided Type: Vent Free