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  • 7/28/2019 Heat Loss Table

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    September 2006

    Heat Loss Calculation Table for Residential Construction

    MANUAL or COMPUTERIZED CALCULATIONS

    Contractor/Builder: Address or Master#: Date:

    1 Space under consideration Crawlspace Basement Main Floor Upper Floor Entire House2 Running perimeter of exterior wall (feet)

    3 Floor area (square feet)

    4 Wall Height (feet)

    TYPE OF EXPOSURE Material R U T Area BTU/hr Area BTU/hr Area BTU/hr Area BTU/hr Area BTU/hr

    A. Concrete earth 25

    B. Concrete air 68

    C. 2x4 68

    5 Net exposed walls

    D. 2x6 68

    E. Window bsmt 68

    F. Window other 68

    6 Windows andGlass doors

    G. Glass door 68

    7 Solid doors H. 68

    Net roof I. Flat ceiling 688

    Skylights J. 68Net roof Ia Sloped ceiling 68

    Pitch in 12

    8a

    Skylights Ja 68

    9 Floors on grade K. Slab insulation 25

    10 Floors / unheated L. 68

    11 Floors / exterior M. 68

    12 Building Envelope Heat Loss (Sum rows 5 through 11) BTU/hr BTU/hr BTU/hr BTU/hr BTU/hr13 Infiltration Heat Loss (Row 3 x Row 4 x 0.52) BTU/hr BTU/hr BTU/hr BTU/hr BTU/hr

    14 Total Heat Loss (Sum Rows 12 and 13) BTU/hr BTU/hr BTU/hr BTU/hr BTU/hr

    Caloric deration of natural gas Output Output Output Output Total Output15 AltitudeDeration Multiply Row 14 by: 1.25 BTU/hr BTU/hr BTU/hr BTU/hr BTU/hr

    Efficiency of heating equipment Input Input Input Input Total Input16 EfficiencyDeration Divide Row 15 by: % BTU/hr BTU/hr BTU/hr BTU/hr BTU/hr

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