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Reschek for heat load calculation?

Bldg_in_Bar_Harbor | Posted in Energy Efficiency and Durability on

I am inputting the envelope data for our new home design in the DOE ResCheck software as a Code compliance tool here in CZ 6A Coastal Maine. One of the outputs of entering the envelope data is an overall UA calculation (U factor x Area summation) including walls, ceilings, floors, doors, etc.
 My question is, how useful could this UA number be (in our case it is 457) be in developing a heat load estimate?
If I use a heating delta T of 80 deg F (inside 70, out -10), I would get a load of  Q=457 x 80 = 36,560 BTu/Hr.

Am I totally misunderstanding this or does this calculation have any validity?

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  1. paul_wiedefeld | | #1

    That’s just part of it, but yes that’s how it’s down. There is infiltration, ventilation, etc not included in that number. Also, the ground won’t be -10 degrees so the floor heat loss isn’t valid.

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