The Flame XTD 1.1 heats 500 - 1,250 square feet of space, with a maximum heat output of 42,000 BTUs. It is mobile home approved. Its firebox is 1.6 cubic feet and holds a maximum log length of 16 inches.
The Flame XTD 1.S heats 850 - 1,550 square feet of space, with a maximum heat output of 60,000 BTUs. It is mobile home approved. Its firebox is 1.8 cubic feet and holds a maximum log length of 18 inches.
The Flame xro 1.9-I heats 1,050 - 1,950 square feet of space, with a maximum heat output of 70,000 BTUs. Its firebox is 2.3 cubic feet and holds a maximum log length of20.