Looking for some opinions. I have a unique house. There is almost 4,000 above ground square feet with cathedral ceilings, loft area, and numerous large windows and doors. The upstairs bathroom extends out above an outdoor patico and there is also 1000 square feet of living space in basement plus other storage area. House is currently heated with an 80 % lp forced air furnace but there is a second 6'' flue for an add on woodstove in the fairly large furnace room. From the furnace room there is access to a large wood room (which happens to be under the patico) with outside shute. I have looked at gasifier forced air, indoor boilers, and outdoor boilers and am more unsure of the best way to heat this monster then ever. I have plenty of room for indoor water storage. I also wouldn't mind heating my attached 2 car garage but there is no ductwork to it. The last problem I have is that the wood room is made completely of concrete and sweats a lot so it is a little damp. Please help!