EPA Phase II and Washington state approved. This gorgeous non-catalytic combustion controlled wood burner includes a decorative cast iron log retainer, textured refractories, choice of doors, efficient air wash system, outside air adaptor, outside air kit, heat activated blower 200 cfm, double air combustion control (all in one).Up to 86.6% efficiency and 55,000 BTU heat output EPA-certified and Washington State-approved 3.7 gr hr emissions Burn time up to 8 hours and heating capacity up to 1,500 sq. ft. Heat-activated variable-speed blower for energy efficient heat distribution Double air combustion control for controlling heat output and wood consumption and for providing air boost control for faster ignition Gravity vent kits double duct for heating multiple rooms 20 Year limited warrantyEPA: EPA Certified Framing Depth: 24-1 2 Framing Height: 42 Framing Width: 36-1 4 Weight: 308