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Sawmill House

Composite Weekly Heating Index, 2006, ... 2009

        HIndex    0.0     1.0     2.0     3.0     4.0     5.0     6.0

        YYYY/MM/DD
        200?/01/04                      7 9   8        5
        200?/01/11                    7  9 86              5
        200?/01/18                 7 9   68           5
        200?/01/25        .       .76 9 8 |       .    5  .
        200?/02/01                  7 968             5
        200?/02/08                 9    6 8            5
        200?/02/15               9  8 6   7                 5
        200?/02/22               69 78                       5
        200?/03/01              69 8  7             5
        200?/03/08        .     9 .8  6   |       .       .     5
        200?/03/15               987                     5
        200?/03/22               9 8 7                           5
        200?/03/29               9  8  67                        5
        200?/04/05               98       7         6   5
        200?/04/12                8 97           6            5
        200?/04/19        .      89       | 7  6  .       .
        200?/04/26             9   8   7                    6
        200?/05/03               9    8   6    7                 5
        200?/05/10                 986  7
        200?/05/17                9       86    7              5
        200?/05/24                  9     7    6
        200?/05/31        .       . 9   7 |       .   6   .
        200?/06/07             8    9     7                     5
        200?/06/14              8 9 6    7                 5
        200?/06/21               9    8
        200?/06/28              9     8
        200?/07/05    8        7
        200?/07/12        .  8    .   6   |       .       .
        200?/07/19                                     7
        200?/07/26                           7            5
        200?/08/02             6
        200?/08/09          8                              6
        200?/08/16          8              5      7           6
        200?/08/23        78      .       |       .       .     5
        200?/08/30  8                       6        5
        200?/09/06      8                6             5
        200?/09/13           8    7     6       5
        200?/09/20       8             76
        200?/09/27     8      6        7 5
        200?/10/04       8.    5  .7   6  |       .       .
        200?/10/11         8       7   5   6
        200?/10/18           8        5  67
        200?/10/25               8     6 7 5
        200?/11/01           8          6 57
        200?/11/08                 5 6 8    7
        200?/11/15        .       .   8   |7      .       5
        200?/11/22                8   6   5 7
        200?/11/29                    68    7          5
        200?/12/06               6         8   7       5
        200?/12/13                   8  6  7       5
        200?/12/20                   6  8  7   5
        200?/12/27        .       .   6 8 |  7  5 .       .

          HIndex   0.0     1.0     2.0     3.0     4.0     5.0     6.0

           5 for Weekly Average Heating Index, BTU/DD/Ft**2, 2005
           6 for Weekly Average Heating Index, BTU/DD/Ft**2, 2006
           7 for Weekly Average Heating Index, BTU/DD/Ft**2, 2007
           8 for Weekly Average Heating Index, BTU/DD/Ft**2, 2008
           0 for Weekly Average Heating Index, BTU/DD/Ft**2, 2009

        As of July 1, 2009

Energy Management Actions -

YYYY/MM

2005/08 Installed cellular window shades

2005/09 Caulked living room baseboards

2006/04 Consistently using heating system low flame setting

2006/08 Installed storm doors on outside doors

2007/11 Second door blower test; infiltration had increased from 0.07 to 0.15 ACH

2008/01 Installed setback thermostat

2008/05 Cut off tops of trees south of house

Methodology -

The Heating Index is evaluated on a daily basis as follows -

The heating system for the house is rated for 40,000 BTU/hour input, at sea level. The house is located at 9,000 feet. The derating for elevation yields an effective 0.56 efficiency at this elevation. Thus, the heating system output is an effective 22,400 BTU.hour. In practice, a low flame setting, which is rated at 3/8 of full output, is used for most of the house heating. The output of this setting is an effective 8,400 BTU/hour. Detailed records are maintained of all heating system times of operation.

Records are maintained of outdoor temperatures. The technique of averaging daily maximimum and minimum temperatures is used to obtain an effective Degree-day value for each day. The usual degree base of 65 degrees is used.

The house floor area is 1152 square feet.

The following calculation is used to obtain a daily Heating Index measured, in BTU/DD/ft**2, value -

(heating system run time * BTU per hour) / (Degree day * Floor area)

Weekly averages are displayed in the above plot for various years.