We supplement forced air heat with a wood burner (its off the to the right). We love having a house that is a simple rectangle with a 1328sf foot print (plus the loft shown above..which is our "winter bedroom". Gets too hot up there in the summer so we sleep down on the main floor).

ETA: We also cook on our woodstove when we're using it, and it is sized to heat the entire main level to comfortable levels. If we heat to "main level comfort" (which is 62F) the loft is a toasty 70F. I can get the back of the hall (shown in the picture) to 78F with the stove (running it at about 450F).