Solar hot water systems in hard freeze areas need a little more engineering to avoid a freeze - up, but this is not terribly difficult. (dotearth.blogs.nytimes.com)
It not only provides heat for the home but also supplements the domestic hot water system. (RedHookDesignAlliance.com)
Forty - three people from the neighborhood have worked there, training on the latest energy technologies including a geothermal heating system and a solar thermal hot water system. (energynews.us)