In 1997, seeing the constant rise in electricity costs, this apartment owner decided to install solar panels on his building. If he were to repeat this project, the owner says he would install the same type, but would make use of the system’s full potential to heat both the hot water tanks along with the building’s floors.
This solar system runs 3 large 270 L (60 gal.) tanks totalling 820 L (180 gal.) which supply hot water for 18 tenants. With a lifespan of more than 35 years, it was rated the best solar system at the time and won first prize in North America. The system uses non-toxic antifreeze (propylene glycol and water). For a family of four, 2 solar panels (6 m2 (65 2000 pi²)) would be sufficient to supply hot water for the whole family.
