Solar System Design Guide
6020 457 - 01
64
General Sizing Guidelines for Domestic Hot Water Preheat Systems
Canadian
Provincial Capitals
Solar Radiation in MJ/m²/day (horizontal plane)
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Edmonton, AB
4.1
8.0
13.0
17.9
20.4
22.0
21.7
18.0
12.8
8.6
4.5
3.0
Victoria, BC
3.2
5.8
10.4
15.8
19.3
21.6
22.7
19.9
14.8
8.2
4.0
2.6
Charlottetown, PEI
5.4
8.8
12.7
15.2
18.3
20.6
20.5
17.5
13.1
8.1
4.6
3.8
Winnipeg, MB
5.0
8.5
13.5
17.6
20.8
22.1
22.8
18.9
13.0
8.0
4.7
3.8
Fredericton, NB
5.5
8.6
12.3
15.3
18.0
19.9
20.0
17.5
13.0
8.6
5.1
4.2
Halifax, NS
5.6
8.9
12.7
14.4
17.7
19.6
19.3
16.9
13.4
8.8
5.3
4.3
Toronto, ON
6.1
8.2
13.0
17.6
19.3
21.0
22.3
19.0
14.0
9.0
4.6
4.3
Quebec City, QC
5.8
9.6
14.7
17.7
19.7
20.6
20.3
17.4
12.6
8.1
5.0
4.5
Regina, SK
5.4
9.4
13.7
19.0
21.9
23.9
24.2
20.1
14.5
9.8
5.5
4.2
St. Johns, NL
4.1
6.9
10.4
13.5
16.5
18.9
19.4
16.0
11.9
7.0
4.1
3.1
Iqualuit, NU
0.8
3.4
9.3
17.4
21.6
20.8
17.8
12.6
7.6
3.4
1.1
0.4
Whitehorse, YT
1.3
3.6
9.2
15.6
19.1
21.1
18.7
14.8
8.9
4.3
1.6
0.7
Yellowknife, NT
1.1
4.2
10.9
18.2
20.3
22.5
20.6
15.3
8.8
3.5
1.4
0.5
Solar Radiation Data For Canada
The details in the table below are only applicable under
the following conditions:
– SW, S or SE collector array orientation
– Roof pitches from 25° to 55°
– Northern latitude of 45°
– Daily hot water consumption of 13 USG (50 L) per
person per day.
Number of
Occupants
Daily DHW demand in USG (L)
[at 140°F (60° C)]
Solar Storage Tank capacity in USG (L)
Number of
Vitosol 200-FM Collectors
Dual coil
Single coil
1
13 (50)
1x 79 (300)
1x 42 (160)
1
2
26 (100)
1x 79 (300)
1x 42 (160)
1
3
40(150)
1x 119 (450)
1x 79 (300)
2
4
53 (200)
2x 79 (300)
1x 79 (300)
3
5
66 (250)
2x 79 (300)
1x 79 (300)
3
7
92 (350)
2x 119 (450)
1x 119 (450)
4
or
or
or
or
or
or
Design and Operation
