The Buck Stove Model 21 is an efficient zone heating stove/insert that also has the capacity to heat smaller homes. It can be installed into an existing fireplace using a faceplate kit or used as a freestanding stove with one of the available leg kits. This unit delivers 41,200 BTUs and can effectively heat spaces ranging from 800 to 1,800 square feet. The Model 21 meets the standards approved by both Washington and Oregon states.