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					        Simple Building Heat Loss Calculator
Building Envelope                                                                                                               Schedules & Temperatures
                     Length Height          Slab           U-Val             Window Qty                Door Qty                 Schedule Name --->              Setback            Other        24h 7d
Walls                   m     m            W/m°C          W/m2°C     1.      2.  3.   4.      5.     1. 2.    3.     Schedule                           Occ'd       Unocc'd
1. Main Walls         180          6         0.1             0.6    30       8                       2   4            24h 7d    Temperatures            20.0 °C    15.0 °C        17.0 °C      20.0 °C
2. Gym Walls          120          10        0.3             0.9                                     3         1       Other       Sunday                            24              24           24
3.                                                                                                                    24h 7d       Monday                 9          15              24           24
4.                                                                                                                    24h 7d       Tuesday                9          15              24           24
5.                                                                                                                    24h 7d       Wednesday              9          15              24           24
                     Length Width                         U-Val                                                                    Thursday               9          15              24           24
Roofs                   m     m              n/a          W/m2°C     1.      2.   3.     4.   5.                     Schedule      Friday                 9          15              24           24
1. Main Roof           50          40        n/a             0.6                  1                                   24h 7d       Saturday                          24              24           24
2. Gym Roof            30          30        n/a              1                                                       24h 7d    Monthly Hours            196        534             730          730
3.                                           n/a                                                                      24h 7d    Ave Temp                      16.3 °C             17.0 °C      20.0 °C
                     Length Width          Infilt.        U-Val                                                                 Temp Diff x hours           54109.4 °C           57968.4 °C   75490.3 °C
Windows                 m     m          L/s per m        W/m2°C
1. Large Th'pane        1          1          2              3.3                                                                Heating Plant Efficiency                                        Internal
2. Small Th'pane       0.3         1          2              3.3                                                                   Fuel Type                       Natural Gas                Heat Gains
3.                                                                                                                                 Combustion Efficiency             85%                        240,000
4.                                                                                                                                 Other Losses                       7%                       kWh/year
5.                                                                                                                              Seasonal Plant Efficiency            78%                          33%
                     Length Width        Infiltration
Doors                   m     m           L/s per m       U-Val
1. Steel Doors         1           2.5       5               2.5                                                                Annual Energy Use                         kWh/year             GJ/year
2. Glass Doors         1           2.5       5               4.5                                                                Component                            Loss         less IHG   Fuel Input
3. Overhead Doors      3            3        10              2.5                                                                   Walls                             111,961          74,717         345
                                                                                                                                   Roofs                             158,530         105,794         488
Slab Heat Loss           W/m°C                                Infiltration            L/s per m                                    Windows                            29,329          19,573          90
1. None                                                           Low                     2                                        Door                               35,628          23,776         110
2. Insulated                 0.1                                Medium                   10                                        Ventilation                       386,016         257,606       1,189
3. Un-Insulated              0.3                                  High                   20                                     Total Building Energy                721,465         481,465       2,222

Ventilation
                                                   L/s per           System       Average         Outside Unocc'd
  Area/System           Persons                    person            litre/sec     O/A %          Air Flow   State   Schedule
1. Class & Offices           120                     15                                                 1800 On       Setback
2. Gym                                                                    3500    100%                  3500 On       Setback
3. Kitchen                                                                 500    100%                   500 On       Setback
            Weather Data

            Site:   Vancouver
                                                     Average Temps for Schedule
                     Monthly             Heating     Setback      Other     24h 7d
Month               Ave Temp      Days   On/Off       16.3 °C    17.0 °C    20.0 °C
January                  3.0 °C    31      On         13.3 °C    14.0 °C    17.0 °C
February                 4.7 °C    28      On         11.6 °C    12.3 °C    15.3 °C
March                    6.3 °C    31      On         10.0 °C    10.7 °C    13.7 °C
April                    8.8 °C    30      On          7.5 °C     8.2 °C    11.2 °C
May                    12.1 °C     31      Off         0.0 °C     0.0 °C     0.0 °C
June                   15.2 °C     30      Off         0.0 °C     0.0 °C     0.0 °C
July                   17.2 °C     31      Off         0.0 °C     0.0 °C     0.0 °C
August                 17.4 °C     31      Off         0.0 °C     0.0 °C     0.0 °C
September              14.3 °C     30      On          2.0 °C     2.7 °C     5.7 °C
October                10.0 °C     31      On          6.3 °C     7.0 °C    10.0 °C
November                 6.0 °C    30      On         10.3 °C    11.0 °C    14.0 °C
December                 3.5 °C    31      On         12.8 °C    13.5 °C    16.5 °C
                                  365              54109.4 °C 57968.4 °C 75490.3 °C
Heat Loss Calculation Page
 Wall    Gross A   Net A       UA        Slab     A1   A2       A3        A4          A5        D1       D2     D3     Wall UAe C-hours   kWh/yr
  1       1080     1032.6    619.56       18      30   2.4      0         0           0          5       10     0       637.56   75,490   48,130
  2       1200     1183.5    1065.15      36      0     0       0         0           0         7.5      0      9      1101.15   57,968   63,832
  3         0        0          0         0       0     0       0         0           0          0       0      0         0      75,490      0
  4         0        0          0         0       0     0       0         0           0          0       0      0         0      75,490      0
  5         0        0          0         0       0     0       0         0           0          0       0      0         0      75,490      0
                                                                                                                                          111,961

 Roof    Gross A    Net A      UA                 A1   A2       A3        A4          A5                               Roof UAe C-hours   kWh/yr
  1       2000      2000      1200                0    0        0         0           0                                  1200    75,490   90,588
  2        900       900      900                 0    0        0         0           0                                  900     75,490   67,941
  3         0         0         0                 0    0        0         0           0                                   0      75,490      0
                                                                                                                                          158,530

Window      A       UA        LPS      Win UAe                                  Door in Wall   UAD1     UAD2   UAD3    DnW UAe C-hours    kWh/yr
   1        1        3.3       8        11.3                                           1        82.5     185     0       267.5  75,490    20,194
   2       0.3      0.99      5.2       6.19                                           2       123.75     0    142.5    266.25  57,968    15,434
   3        0         0        0          0                                            3         0        0      0         0    75,490       0
   4        0         0        0          0                                            4         0        0      0         0    75,490       0
   5        0         0        0          0                                            5         0        0      0         0    75,490       0
                                                                                                                                          35,628

 Doors      A        UA       LPS      Door UAe         Window in Roof   UAW1       UAW2       UAW3     UAW4   UAW5    WnR Uae C-hours    kWh/yr
   1       2.5      6.25       35        41.25                   1         0          0          0        0      0       0      75,490      0
   2       2.5      11.25      35        46.25                   2         0          0          0        0      0       0      75,490      0
   3        9       22.5      120        142.5                   3         0          0          0        0      0       0      75,490      0
                                                                                                                                            0

System    Flow     C-hours   kWh/yr                     Window in Wall   UAW1       UAW2       UAW3     UAW4   UAW5    WnW UAe C-hours    kWh/yr
   1      1,800     54,109   119,798                             1        339       49.52        0        0      0      388.52  75,490    29,329
   2      3,500     54,109   232,941                             2         0          0          0        0      0        0     57,968       0
   3       500      54,109   33,277                              3         0          0          0        0      0        0     75,490       0
                             386,016                             4         0          0          0        0      0        0     75,490       0
                                                                 5         0          0          0        0      0        0     75,490       0
                                                                                                                                          29,329

				
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posted:11/24/2011
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