Sawmill House

Return to SCCS Home page>
Return to House Modeling Home page>

The Sawmill House

Sawmill House Annual Heat Budget vs House Infiltration.

Annual Heat Budget vs House Infiltration

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

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

 0.00   9.32     3.89     6.19    11.62     0.79     0.00   31.82   2.79    15.28    16.54     1.45   322.77
 0.01   9.32     3.89     6.19    11.62     0.79     0.58   32.40   2.84    15.28    17.12     1.50   334.13
 0.02   9.32     3.89     6.19    11.62     0.79     1.16   32.98   2.89    15.28    17.70     1.55   345.48
 0.03   9.32     3.89     6.19    11.62     0.79     1.75   33.57   2.94    15.28    18.28     1.60   356.84
 0.04   9.32     3.89     6.19    11.62     0.79     2.33   34.15   3.00    15.28    18.87     1.66   368.19
 0.05   9.32     3.89     6.19    11.62     0.79     2.91   34.73   3.05    15.28    19.45     1.71   379.55
          *** 20 percent less auxiliary annual heating needed per year
 0.06   9.32     3.89     6.19    11.62     0.79     3.49   35.31   3.10    15.28    20.03     1.76   390.90
 0.07   9.32     3.89     6.19    11.62     0.79     4.07   35.89   3.15    15.28    20.61     1.81   402.26
 0.08   9.32     3.89     6.19    11.62     0.79     4.65   36.48   3.20    15.28    21.19     1.86   413.62
 0.09   9.32     3.89     6.19    11.62     0.79     5.24   37.06   3.25    15.28    21.78     1.91   424.97
 0.10   9.32     3.89     6.19    11.62     0.79     5.82   37.64   3.30    15.28    22.36     1.96   436.33
          *** 10 percent less auxiliary annual heating needed per year
 0.11   9.32     3.89     6.19    11.62     0.79     6.40   38.22   3.35    15.28    22.94     2.01   447.68
 0.12   9.32     3.89     6.19    11.62     0.79     6.98   38.80   3.40    15.28    23.52     2.06   459.04
 0.13   9.32     3.89     6.19    11.62     0.79     7.56   39.39   3.46    15.28    24.10     2.11   470.39
 0.14   9.32     3.89     6.19    11.62     0.79     8.15   39.97   3.51    15.28    24.68     2.17   481.75
 0.15   9.32     3.89     6.19    11.62     0.79     8.73   40.55   3.56    15.28    25.27     2.22   493.10
          *** Sawmill House
 0.16   9.32     3.89     6.19    11.62     0.79     9.31   41.13   3.61    15.28    25.85     2.27   504.46
 0.17   9.32     3.89     6.19    11.62     0.79     9.89   41.71   3.66    15.28    26.43     2.32   515.81
 0.18   9.32     3.89     6.19    11.62     0.79    10.47   42.29   3.71    15.28    27.01     2.37   527.17
 0.19   9.32     3.89     6.19    11.62     0.79    11.06   42.88   3.76    15.28    27.59     2.42   538.53
          *** 10 percent more auxiliary annual heating needed per year
 0.20   9.32     3.89     6.19    11.62     0.79    11.64   43.46   3.81    15.28    28.18     2.47   549.88
 0.21   9.32     3.89     6.19    11.62     0.79    12.22   44.04   3.86    15.28    28.76     2.52   561.24
 0.22   9.32     3.89     6.19    11.62     0.79    12.80   44.62   3.91    15.28    29.34     2.57   572.59
 0.23   9.32     3.89     6.19    11.62     0.79    13.38   45.20   3.97    15.28    29.92     2.62   583.95
          *** 20 percent more auxiliary annual heating needed per year
 0.24   9.32     3.89     6.19    11.62     0.79    13.96   45.79   4.02    15.28    30.50     2.68   595.30
 0.25   9.32     3.89     6.19    11.62     0.79    14.55   46.37   4.07    15.28    31.09     2.73   606.66
 0.26   9.32     3.89     6.19    11.62     0.79    15.13   46.95   4.12    15.28    31.67     2.78   618.01
 0.27   9.32     3.89     6.19    11.62     0.79    15.71   47.53   4.17    15.28    32.25     2.83   629.37
 0.28   9.32     3.89     6.19    11.62     0.79    16.29   48.11   4.22    15.28    32.83     2.88   640.72
          *** 30 percent more auxiliary annual heating needed per year
 0.29   9.32     3.89     6.19    11.62     0.79    16.87   48.69   4.27    15.28    33.41     2.93   652.08
 0.30   9.32     3.89     6.19    11.62     0.79    17.46   49.28   4.32    15.28    33.99     2.98   663.43
 0.31   9.32     3.89     6.19    11.62     0.79    18.04   49.86   4.37    15.28    34.58     3.03   674.79
 0.32   9.32     3.89     6.19    11.62     0.79    18.62   50.44   4.43    15.28    35.16     3.08   686.15
 0.33   9.32     3.89     6.19    11.62     0.79    19.20   51.02   4.48    15.28    35.74     3.14   697.50
 0.34   9.32     3.89     6.19    11.62     0.79    19.78   51.60   4.53    15.28    36.32     3.19   708.86
          *** 40 percent more auxiliary annual heating needed per year
 0.35   9.32     3.89     6.19    11.62     0.79    20.36   52.19   4.58    15.28    36.90     3.24   720.21
 0.36   9.32     3.89     6.19    11.62     0.79    20.95   52.77   4.63    15.28    37.49     3.29   731.57
 0.37   9.32     3.89     6.19    11.62     0.79    21.53   53.35   4.68    15.28    38.07     3.34   742.92
 0.38   9.32     3.89     6.19    11.62     0.79    22.11   53.93   4.73    15.28    38.65     3.39   754.28
 0.39   9.32     3.89     6.19    11.62     0.79    22.69   54.51   4.78    15.28    39.23     3.44   765.63
 0.40   9.32     3.89     6.19    11.62     0.79    23.27   55.10   4.83    15.28    39.81     3.49   776.99

Column Headings -

  HInf   House Infiltration, Air Changes per Minute (ACH)
  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 infiltration of the Sawmill House was measured as 0.07 ACH immediatly after construction. A second evaluation three years later reported an ACH value of 0.16 air changes per hour.

As of August 5, 2009

Copyright ©2002, 2009 E. Stiltner.

Return SCCS Page Return to House Modeling Home Page>



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