You answered your own question. Modern homes have much less infiltration than homes 20 yrs old. Wind exposure and solar gain can make a big difference also. As for the domestic hot water usage, that totally depends on how much hot water you use. I am sure you will agree that a house with two energy-conscious adults will use less hot water than a house with three teenagers taking long showers...add in a soaker tub for "mom" and suddenly the DHW load starts to get scary.imcloud1 wrote:WOW, why are you guys burning so much coal, 5 tons is a lot? Our annual dd is around 6200 my house is over 4000 sq feet and we use 3 tons, house is very well insulated but rite now the living room is 73 degrees because my wife is always cold.... no dhw though but that shouldn't use much coal..
As for Larry's question, I know three people running AA130's and they average about 5 tons per year. Some people will burn more than others...my assessment is that if the stack temperature is reasonable and the house is comfortable, you are doing fine. Keeping the wind from blowing through your house is the #1 thing you can do to save fuel/coal.
I have gotten some strange looks when I mention how much coal I burn...but depending on which chart you look at my annual DD are in the 8000 range, the house is 100 yrs old, some windows need attention, the wind exposure is SEVERE, the house has very little Southern exposure, we like it warm, and our domestic hot water usage is probably well above average.
