Drolet Hunter Wood Stove
http://www.canadiantire.ca/en/pdp/dr...-0642893p.html
I think you can buy them at Peavy Mart too.
I use this in my 14x16 wall tent and it does a great job. The flat top is nice (I know you said you don't need to cook on it but its nice to keep coffee warm) and will support an Eco-Fan, which you should definitely also buy.
I can damper this down and almost get a full nights' burn out of it.