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estimated fuel usage

Rocky_2
Rocky_2 Member Posts: 89
in THE MAIN WALL
Does anyone know a pen and paper formula I can apply when trying to come up with an estimated annual fuel consumption for a new building so I can give the owner a rough idea of what to expect? Several generous Wallies have plugged my numbers into Siggy's Hydronic design program, and I am ordering one of those myself tomorrow, but tonight I need a formula that I can play around with myself at my home where I can vary the btu requirments, boiler efficiencies, indoor temperature and see how all these come about. This will be a hanger that will only be about 55 degrees inside. Any help would be appreciated

Thanks,
Rocky
rockyp@alaska.net

Comments

  • hr
    hr Member Posts: 6,106
    Some of the info

    will come off the bottom number of your heat loss calc sheet. Mainly the building load at various indoor/ outdoor temperatures. Cooler indoor temperatures= less total load #'s.

    Then all you need is fuel cost figures and equipment efficiency stats. The last number is the hardest to pin down. Do you believe AFUE? It gets a little gray when comparing condensing equipment.

    I've used condensors in a couple large shop applications 10,000 sq footers. The parts and labor is considerably less when all you need is a boiler, one or two pumps and radiant manifold :)

    Lots of energy suppliers (online) have energy calculatore. I think www.uselp.com has one. They may be skewed towards the energy they sell, however.

    hot rod


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