Chrisman at SunEarth has a rule of thumb: Solar water heaters can be effective anywhere below the 55th parallel (just north ...

Taking a hot shower can literally mean pouring money down the drain. The average American household spends almost $300 pear year to heat water. If you spend a little extra time in the shower, that ...

Essentially, it allows the water heater to get much hotter during times when solar energy is available, and lets it drop to lower values before running the heater on utility electricity during ...