And that begs a caution for anyone considering a DIY solar water heater: Don't forget to include hoisting it onto the roof, ...

There are a lot of DIY solar water heater designs out there, but you'd be hard-pressed to find one simpler, cheaper, and ...

There's a little risk involved with all the plumbing, and if you have a gas water heater, there's gas to worry about -- it's not so much a DIY thing unless you know what you're doing.