Model 21NC is an efficient zone heating stove/insert that is also capable of heating smaller homes. The Model 21NC can be installed into an existing fireplace with a face-plate kit or be utilized as a freestanding stove by choosing one of the leg kits. This unit provides 41,200 BTU’s and can heat 800 to 1,800 square feet. The Model 21NC is approved for both Washington and Oregon State Standards.