Hey everyone, I'm new to the forum, and new to the wood heating world with a few questions. I spent some time reading through past posts the best I could, but still have some things about my particular setup I would like to run past you all. My house is a 2750' square foot brick ranch with half of that being my unfinished basement. My current heating system consists of a combination of heat pump, and back up resistance coil. My obvious problem is my cost of electricty during the winter months where are lows are generally in the 20's. My house is well insulated since we added blown in insulation at the beginning of 2008. I would like to install a wood burning furnace as an addition to my current heat source. We have access to free, seasoned fire wood on our property so we would not have to pay for fuel for a long time. I have been looking at DAKA's 521FB unit as well as a similar furnace from US Stove called the 1500 hot blast. My questions begin here, since my current heat source is not vented my options for where the flue would go are realitvely limited. I have two windows that are within aproximetly 15' from where the furnace would tie into my plenum. Would having a flue that long cause any issues ? There would only be two 90 degree turns before it was on it's way to the top of the roof line. If this can be done I planned on having the flue bricked into the concrete frame where the window is. Or would it be better to put the furnace closer to the window, and run the two ducts the 15' to the existing furnace ?? My last question is a simple one.... Can this even be done with my current type of heat source ? Another thing I would like to add is that in case of a power outtage I do have two large generators I plan on using for the blower on the furnace if need be. Thanks everyone for taking the time to read through this.