Sawmill House

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The Sawmill House

Annual Heat Budget vs Room Temperature

The following table presents estimates of the annual heat budget for various room temperature values -

 RoomT  Walls   Wndws    Ceilng   Floor    Doors   Inflt    LSum1  HIndx1   SGain    LSum2   HIndx2   NGals

  55    4.62     1.93     6.19    11.64     0.39     7.10   31.88   2.80    15.28    16.59     1.46   323.82
  56    4.91     2.05     6.19    11.64     0.42     7.24   32.45   2.85    15.28    17.17     1.51   335.11
  57    5.21     2.18     6.19    11.64     0.44     7.38   33.03   2.90    15.28    17.75     1.56   346.40
  58    5.50     2.30     6.19    11.64     0.47     7.51   33.61   2.95    15.28    18.33     1.61   357.69
  59    5.79     2.42     6.19    11.64     0.49     7.65   34.19   3.00    15.28    18.91     1.66   368.98
  60    6.09     2.54     6.19    11.63     0.52     7.79   34.77   3.05    15.28    19.49     1.71   380.27
  61    6.38     2.67     6.19    11.63     0.54     7.93   35.35   3.10    15.28    20.06     1.76   391.56
          *** 20 percent less auxiliary annual heating needed per year
  62    6.68     2.79     6.19    11.63     0.57     8.07   35.92   3.15    15.28    20.64     1.81   402.85
  63    6.97     2.91     6.19    11.63     0.59     8.21   36.50   3.20    15.28    21.22     1.86   414.14
  64    7.26     3.04     6.19    11.63     0.62     8.34   37.08   3.25    15.28    21.80     1.91   425.43
  65    7.56     3.16     6.19    11.63     0.64     8.48   37.66   3.30    15.28    22.38     1.96   436.72
  66    7.85     3.28     6.19    11.63     0.67     8.62   38.24   3.35    15.28    22.96     2.01   448.01
          *** 10 percent less auxiliary annual heating needed per year
  67    8.14     3.40     6.19    11.63     0.69     8.76   38.82   3.41    15.28    23.53     2.06   459.30
  68    8.44     3.53     6.19    11.62     0.72     8.90   39.40   3.46    15.28    24.11     2.12   470.59
  69    8.73     3.65     6.19    11.62     0.74     9.03   39.97   3.51    15.28    24.69     2.17   481.88
  70    9.03     3.77     6.19    11.62     0.77     9.17   40.55   3.56    15.28    25.27     2.22   493.17
          *** Sawmill House
  71    9.32     3.89     6.19    11.62     0.79     9.31   41.13   3.61    15.28    25.85     2.27   504.46
  72    9.61     4.02     6.19    11.62     0.82     9.45   41.71   3.66    15.28    26.43     2.32   515.75
  73    9.91     4.14     6.19    11.62     0.84     9.59   42.29   3.71    15.28    27.01     2.37   527.04
  74   10.20     4.26     6.19    11.62     0.87     9.72   42.87   3.76    15.28    27.58     2.42   538.33
  75   10.49     4.39     6.19    11.62     0.89     9.86   43.44   3.81    15.28    28.16     2.47   549.62
          *** 10 percent more auxiliary annual heating needed per year
  76   10.79     4.51     6.19    11.62     0.92    10.00   44.02   3.86    15.28    28.74     2.52   560.91
  77   11.08     4.63     6.19    11.61     0.94    10.14   44.60   3.91    15.28    29.32     2.57   572.20
  78   11.38     4.75     6.19    11.61     0.97    10.28   45.18   3.96    15.28    29.90     2.62   583.49
  79   11.67     4.88     6.19    11.61     0.99    10.41   45.76   4.01    15.28    30.48     2.67   594.78
          *** 20 percent more auxiliary annual heating needed per year
  80   11.96     5.00     6.19    11.61     1.02    10.55   46.34   4.07    15.28    31.05     2.72   606.07
  81   12.26     5.12     6.19    11.61     1.04    10.69   46.92   4.12    15.28    31.63     2.78   617.36
  82   12.55     5.25     6.19    11.61     1.07    10.83   47.49   4.17    15.28    32.21     2.83   628.65
  83   12.85     5.37     6.19    11.61     1.09    10.97   48.07   4.22    15.28    32.79     2.88   639.93
          *** 30 percent more auxiliary annual heating needed per year
  84   13.14     5.49     6.19    11.61     1.12    11.10   48.65   4.27    15.28    33.37     2.93   651.22
  85   13.43     5.61     6.19    11.60     1.14    11.24   49.23   4.32    15.28    33.95     2.98   662.51
  86   13.73     5.74     6.19    11.60     1.17    11.38   49.81   4.37    15.28    34.53     3.03   673.80
  87   14.02     5.86     6.19    11.60     1.19    11.52   50.39   4.42    15.28    35.10     3.08   685.09
  88   14.31     5.98     6.19    11.60     1.22    11.66   50.97   4.47    15.28    35.68     3.13   696.38
          *** 40 percent more auxiliary annual heating needed per year
  89   14.61     6.10     6.19    11.60     1.24    11.79   51.54   4.52    15.28    36.26     3.18   707.67
  90   14.90     6.23     6.19    11.60     1.27    11.93   52.12   4.57    15.28    36.84     3.23   718.96

Column Headings -

  RoomT  Room temperature, degrees Fahrenheit
  Walls  Walls annual heat loss, MBTU/year
  Wndws  Windows annual heat loss, MBTU/year
  Clng   Ceiling annual heat loss, MBTU/year
  Floor  Floor annual heat loss, MBTU/year
  Doors  Doors annual heat loss, MBTU/year
  Iflt   Infiltration annual heat loss, MBTU/year
  LSum1  Sum of annual (walls ... infiltration) losses, no solar Gain
  HIndx1 Heating Index, BTU/DD/Ft**2, No solar gain
  SGain  Annual solar gain, MBTU/year
  LSum2  Net sum of Heat Losses, including solar gain, MBTU/year
  HIndx2 Heating Index, BTU/DD/Ft**2, with solar gain
  NGals  Estimated Annual propane need, gallons/year, exclusive of domestic hot water

Notes - The typical room temperature of the Sawmill House is 71.0 degrees Fahrenheit.

As of August 5, 2009

Copyright ©2002, 2009 E. Stiltner.

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Updated '8-Aug-2009,11:50:40'