The SW180 Insert provides the same efficiency and heat output of the SW180 freestanding unit in a wood-burning insert. The perfect alternative to a drafty chimney, the SW180 fits easily into your existing masonry fireplace and will fit almost any UL listed pre-fab fireplace.Up to 79,000 BTU's Up to 1,200 sq. ft. Up to 17 inch log length BLOWER INCLUDED Pre-Fab Approved EPA: Certified 3.1g hrDepth: 22 inch Height: 18 inch Weight: 465 lbs Width: 30 inch