Does a solar water heater freeze in winter? | ||
The water tank is well insulated. The National Solar Lab test results show that overnight the IP-195 unit loses 1°C for every 6.43 degrees difference between the tank temperature and the air temperature. It loses less energy during a night than it picks up during the day, even in a cloudy or snowing day (See Fig. 1). | ||
Heating cables are installed and applied with the plumbing lines outside of the house to keep the lines warm in the winter time. It is automatically controlled by a controller (See Fig. 2). | ||
In the GTA, there are now over 300 units of IP-195 working safely and no winter issues, with the earliest serving five winters already. | ||
Figure 1. Well-insulated Water Tank |
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Figure 2 .Heating cables |
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