The 864 High Output GreenSmart fireplace offers the same viewing area as the 864 TRV fireplace, and is designed to heat a larger area – up to 2,500 square feet. The Award-Winning Ember-Fyre burner comes standard with a seven piece high definition log set and grate. With a 46,700 BTU input, high heat transfer neo-ceramic glass and fan, all standard, this fireplace delivers the heat! This high output fireplace uses “film cooling” technology allowing for close clearances to combustibles, letting you install the mantel close to the fireplace in a traditional location. For ease of operation and convenience the 864 High Output fireplace includes the GreenSmart Remote Control. You can heat your family’s main living area or duct up to 50% of the heat to adjoining room(s) 20 feet away using the optional Power Heat Duct Kit; one or two kits can be used.