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Looking at the following numbers, just curious if there is something I should do to improve my system for next year. Triangle Tube 110 propane. Radiant slab and baseboard mix and 50 gallon indirect HW. Design temp -9, outdoor reset. Heat loss 90k.
From Feb 3rd to March 5th, 31 days I used 322 gallons to heat my 3,400sq/ft home.
1400 degree days
During that time, the boiler ran for both heat and hot water priority for 400 hrs(330 for heat, 70 for hw) or about 13hrs a day.
So as I was burning about 10 gallons a day, the boiler was running about 13 hrs a day.
so 10.3 gallons x 91,500= 942,450/31=/ 24= 30,401 btu/hr/3400sq/ft=8.9 btu/hr per sqft
Does this sound correct?
On the other hand the boiler was burning 10 gallons a day running for an average of 13hrs. If it (87k for lp) ran full tilt at 95%, it would burn 82,650 btu/hr. x 11hrs( just for Heat) = 909,150= 37,881btu/hr/ 3400sqft= 11.1 btu/hr/sqft. T
So in the end, I heated my house this month on 8.9btu a square foot and if the boiler had run at 100% it would have heated my home at 11.1 btu a square foot. So is it safe to say, the boiler did its job and modulated?