12:30pm it is 12F outside with a 22mph wind gusting to 33mph with about 80% Sun. The temp inside is 73.7F. I heat with wood and oil fired forced hot water. The oil boiler has 4 thermostats are set at 55F. At 5 this morning I put another small piece of wood in the stove. 8am banked up the coals and have left it alone since. I heat about 2400sf, burn about 200 gallons of oil and 2-2 1/2 cords of wood a year for heat and hot water. I designed and built my house in 1988 for maximum solar gain. Subbed out the plumbing and concrete work, did everything else myself.