Heat Loss

Discussion in 'HVAC Heating & Cooling' started by Nate R, Feb 21, 2008.

  1. Nate R

    Nate R Member

    Jan 11, 2007
    I perform R&D testiing at small engine manuf.
    Milwaukee, WI
    Always a good feeling when your calculations translate to real life. :D

    Used the ResCheck program available for download for free from the DOE. http://www.energycodes.gov/rescheck/
    It's a great program intended for calculating whether your new home or addition will meet energy standards. But it also will then calculate the building's heat loss. Wanted to to a heat loss calculation on my house now, and on my house when I'm done w/ the new windows, additional insulation, etc.

    Did the heat loss check, and the calculation came out w/ my house needing 32000 BTU when it's -10 outside, or about 28000 when it's 0. It was a steady 0 degrees last night. No stove on, no dryer running, etc. Timed the furnace cycles a few times and found it was using about 27000 BTU. I couldn't ask for any closer than that!

    The only problem of course is that the furnace is putting out 56000 BTU. I'll put this unit in the garage and change it out for a 36000 BTU output 2 stage model next year. I was planning on buying a furnace for the garage anyway, but this way I'll save money on the house heat w/ a better sized furnace. House will be better insulated too, only requiring 26000 BTU at -10 degrees, so I still will have plenty of headroom, but I can't get a smaller furnace.

    Just thought I'd share the ResCheck program.
    Last edited: Feb 21, 2008
  2. milesjamie

    milesjamie New Member

    Feb 27, 2008
    Resfin Explorer


    I haven't used the DOE software, but over the weekend I found, downloaded, and used the rather user-friendly heating loss calculator from Slant/Fin.

    I found this by reading the HVAC section of a messaging board used by heating contractors, and apparently it is well known.

    It is free at http://www.slantfin.com/heat-loss-software.html.
  3. Sponsor

    Sponsor Paid Advertisement

Similar Threads: Heat Loss
Forum Title Date
HVAC Heating & Cooling Confused by Heat Loss Calc - Furnace Size Feb 22, 2012
HVAC Heating & Cooling Heat Loss Calc. Help Dec 3, 2011
HVAC Heating & Cooling Heat Loss Dec 30, 2007
HVAC Heating & Cooling Heat Loss Analysis Calculation? Nov 5, 2007
HVAC Heating & Cooling Electric toe kick heater - thermostat or switch? Sep 4, 2017

Share This Page