Here's a convergence device you probably haven't heard much about at technology conferences, but it's interesting.
SolarAttic sells a system--the Pool Convection System 2--that sucks hot air out of the attic of your house and pumps it into a heat exchanger to heat your pool. In the summertime, the temperature in your attic can get up to 150 degrees Fahrenheit, says SolarAttic vice president James Kantorowicz.
"It also helps cool down the house by transferring that heat out of the attic," he said.
The system costs around $5,000 (including installation), which makes it comparable … Read more