White Mountain Hearth Elite 18-Inch Vented Gas Burner, 33,000 Btu

The White Mountain Hearth BFE18MTN is built around a single, practical premise: your existing masonry fireplace already does most of the hard work. The firebox, the flue, the hearth — it's all there. This 18-inch burner system slots in and adds reliable, variable gas heat without requiring a structural overhaul or a hardwired electrical connection.

At 33,000 Btu, this is a serious heat source, not a decorative afterthought. The intermittent pilot ignition is battery-powered, so operation is clean and self-contained. There's no standing pilot burning gas around the clock, and no need to run electrical lines into your firebox. The variable remote control gives you full flame adjustment from across the room — which, on a cold evening, is exactly where you want to be.

Installation requires a solid-fuel burning fireplace with a functional flue and non-combustible interior materials. Minimum clearances to keep in mind: 29 inches at the front width, 19 inches at the rear width, 14 inches of depth, and 20 inches of height. The chimney vent opening must be at least 49 square inches, and chimney height no less than 10 feet. If your existing fireplace checks those boxes, the BFE18MTN is engineered to fit cleanly within it.

This burner ships as a natural gas unit and includes an LP conversion kit, so switching fuel sources later doesn't mean sourcing a separate part. The air shutter is set to 1/16 inch open from the factory — a precise calibration detail that reflects the care built into this system.

A compatible vented log set is required for installation and sold separately. The BFE18MTN is confirmed compatible with the Pioneer Refractory Vented Log Set and the Kensington Forest Ceramic Fiber Vented Log Set — both 18-inch options that pair naturally with this burner. One practical note: glass fireplace doors must remain open during operation, as this is a vented system that draws combustion air from the room.

This is not a unit for every installation — it's specifically designed for solid-fuel burning fireplaces with a working flue, and it should not be used with solid fuels once converted. But for the fireplace that qualifies, the BFE18MTN delivers the kind of controlled, adjustable gas fire that makes you wonder why you were stacking wood for so long.

• 18-inch burner rated at 33,000 Btu
• Battery-powered intermittent pilot — no hardwired electrical connection required
• Variable remote control for flame adjustment from anywhere in the room
• Natural gas unit with LP conversion kit included
• Designed for installation in existing solid-fuel burning fireplaces with working flue
• Compatible with Pioneer Refractory and Kensington Forest 18-inch vented log sets (sold separately)
• Minimum fireplace requirements: 29" front width, 19" rear width, 14" depth, 20" height
• Minimum chimney vent opening: 49 sq. in.; minimum chimney height: 10 ft.
• Air shutter factory-set to 1/16" open
• Glass fireplace doors must remain open during operation
• Not compatible with solid fuel use