You can build one that kicks the cylinder stoves butt. Just find an old round-door Sotz barrel stove kit......mine is on cut down 15 gallon drum for a smaller tent.

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If it is bigger ya want, the square-door Sotz kit will fit a 30 or 55 gallon drum. Vogelzang also makes a cast iron door kit for the bigger barrels. Not as efficient or air-tite as the Sotz. I heated my shop with the sotz double barrel.....

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Had the Cylinder Stove, it was good, buy not quite a Sotz....

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