Update on fireplace; It is rated very efficient at 90%. I believe it! So far the most wood we burned during winter was about 2.5 cords of hardwood. Our family owns the forest of trees we just cut,split and haul. It is considered a vacation time for us to do this for my wife and I. However this has changed now, since I can no longer cut wood nor get to the tree due to the wheelchair issue. Wife & Family will have to cut and do most of spitting maybe I can work the controls for splitter. Still glad we are using wood heat instead of gas heat. On the coldest night of 0 degrees or lower (2) 5.5 inch diameter logs 16 inches long will last 7-8 hrs and still put out 400 degrees of heat. we use 2 small 8 inch fans running lo speed for 20 minutes on the hour to distribute heat throughout ranch style house. Our gas bill does not change from summer to Winter. Our electric bill is very high when considering we need furnace fan for filter or humidity control only not heat. Only problem we have in house is extreme low humidity! With my old furnace (1989) it is inefficient to run the fan and furnace humidifier for humidity and filtration. The so called whole house humidifiers only work in one room and not the fireplace room. Any ideas on maybe converting furnace fan motor to ECM motor? With the new fan motor running at a slower circulation speed for humidity circulation cost of water heater may go up a bit but electric bill should go down with lower motor wattage bill. The only time we use gas heat is when we go out of town for weekend or mild winter day of 60 degrees otherwise we use wood heat all the time. Is the ECM cost effective. I also need a new humidifier our aprilaire housing leaks. When the furnace humidifier was working correctly prior to it leaking water it raised level of humidity in house to comfortable level with furnace fan running 20-30 minutes.