This unit was used for a season and a half. We used it to heat our 3000 sq. ft house with ease. Below is the details on it. I will also include the tractor supply link for the stove. Sells for $1400 new. I will include some ducting with it. I piped it into the existing ductwork of the house for even distribution.
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http://www.tractorsupply.com/tsc/product/united-states-stove-hot-blast-warm-air-furnace-2-500-sq-ft