Here is what I currently have: - 2900 sq ft house in northern climes of the Great Lakes with average to a little above average insulation. (Insulation upgrades planned) - An oil forced air furnace circa 1974 that is very inefficient and ridiculous to feed. Oil use is running about $900/6 weeks. (225 gal roughly @ 67*) - A 500 gal in ground oil tank at the end of it's life. - Electric water heater that I'm to too concerned about but wanted to add it as a reference point. - There is a separate (not connected to or near furnace) wood burner on the opposite side of the basement that need serious work. It is literally falling apart. This is a much lower priority. I will take that discussion to a different forum. - A brand new Carrier 5 ton air condenser I don't want to lose or at least get cash back on. Goal: upgrade as to a more efficient primary system with support to cover outages and/or lower primary source use keeping expense vs usage savings in mind. My choices for fuel are propane, oil or electric. (wood and biomass). I am interested to have a secondary source of heat during power outages. I live in a rural area and we frequently see several day outages as well as to reduce of oil/electric expenses. I do not want an outdoor heat source. Oil prices are about $3.70 and climbing. Electricity is 6.2 cents/kwh. Right now propane isn't really a contender but I am open to the idea. Geothermal installation is too expensive. Natural gas is not available. Wood or pellets would be purchased and some wood supplemented from our property. The primary heat source would NOT be wood/pellets. I am physically unable to move wood and handle feeding a fire several times a day. Expense factors: -old in ground oil tank will have to be decommissioned with any choice. - if oil/propane are chosen a new above ground tank will be needed. I would like to have a set up something like a main furnace that is either electric or oil burning with wood burning capabilities. I am not clear if a single unit that does both or a dedicated furnace with an add on is a better choice. I looked at the Yukon wood/electric furnace but have no idea what it would cost to run if electricity is used more than wood. I looked at an add on stove to an existing furnace. I also looked at a heat pump but would lose my brand new a/c condenser. Are there any resources that will help narrow down my choices? Any resources to help figure out a budget? Right now my very rough estimates are: Oil Furnace - $3k installed/old hauled off New oil tank $2500-3k Old in ground tank decommission - $2500-3k. (Likely done a little later than install to help cash flow if permissible by ordinance) This sketch has lacks any secondary fuel features. Electric looks better because of the new tank but may be shooting myself in the foot long term. I plan to be in this house at least another 5-10 years possibly more but I hope not. I want to do this right but as cost efficiently as possible or do the upgrade in stages. Any thoughts? I'm completely overwhelmed. Thanks!