VIA E-MAIL — I saw Dave Yates' column about swimming pools at contractormag.com and have a question about gas lines for pool heaters ("Spring means it's pool heater mania time," May, pg. 52). We plan ...

For those cool summer days it’s sometimes nice to have a heated pool — but usually pretty expensive too. Looking for a simpler solution [Martin] came up with his own solar pool heater for under $100!

We mostly think of home swimming pools as summer diversions. After all, the most efficient heater available to us, the sun, is keeping the water warm at all times. But, thanks to solar panels, you can ...