110k BTU 80% AFUE Multi Speed MrCool Gas Furnace - Multiposition - 21" Cabinet

Unless you live in very specific parts of the country, you need winter heating. You could move out into the hills, cut down a tree, chop up the bits, build a wood stove from old car parts, and heat your home that way. Or you could just buy a MRCOOL 80% AFUE 110k Gas Furnace. This is a CSA design-certified, multipoise design. It's powerful, efficient, effective, and way easier than, well, cutting down a tree.