WNY wrote:Normally you should do a Heat Loss calc. for your house, that would get your close. How much is your existing boiler output? or do you know how much baseboard elements you current have? Most use 500-600BTU per Foot output. I believe there are link in some other threads for HEAT LOSS CALCULATOR. This has been discussed many times.
You might be surprised on the output. Coal is different than gas, oil, etc... My smaller coal stove only has a small 6" x 12" burn plate and puts out 90K btu's. COAL has a very high BTU output. So, you don't need much to get a lot of heat out of it. Plus with a boiler, you have a lot of volume to keep warm, once it gets warm, it doesn't need as much BTU, with coal, even at IDLE, it will keep the water up to a certain temp.
I know the Harmen VF3000 is rated like 95K BTU and states it will heat up to 3000 sq. ft. It all depends on your system, house insulation, windows, etc.....
What's your heat loss?
wantab coal burner wrote: It kinda scared me when I was in the basement with 6- 275 gal oil tanks
whistlenut wrote:The heat loss will verify what you suspect: Of course it will heat it, but you sure don't want to be running at 10 teeth and 10 air and sucking down 20 lbs an hour. That would be 20lbs times 13,000 BTU's per pound, times 80% boiler efficiency, or 260,000*80%.....208,000 btu available at your greatest heat demand period. I'll bet your heat loss will show peak demand at about 145,000 btu. Get the real numbers before you make a definitive plan.
550 gallons is the limit here also....but that is today, who knows what the code was when it was first installed.....or added to.
I hate to add this comment, but I DO know a guy who was getting divorced....and the soon to be ex was living in the house....he paid all the expenses, heat electric, etc. She would leave for work at 7AM with all the windows in the house open and the TT's at 80 degrees. 3000.00 a month in Dec, Jan, Feb, March of 2009/2010 in a brand new house. Ouch!!!!