Bob Ramlow wrote:Tube collectors do work best in warm climates and flat plate collectors work great in all climates. My experience with tube collectors has been less than perfect while I have seldom had a problem with flat plate collectors.
Al Freeman wrote:Noob (to this 4m) here. I am nearly 70 and am a retired plumbing contractor with 48 years of on-the-job.
Oh, by the way -- You know there's not really any such thing as a hot water heater right? I mean, really; who would heat hot water?
Bob Ramlow wrote:Dave, it is relatively easy to build your own solar air heating collectors. Just make sure you do not use wood or plastic in them as then they could start a fire. I talk about air collectors in my book. I built my first air collector in 1971. For solar water heating I suggest just purchasing a good flat plate collector. They are not that expensive but are nearly impossible to make yourself, (I've tried).
Rick, I have worked on thermosyphon glycol systems and they can work. The piping installation has to be meticulous with proper slope and no traps. I would not suggest evacuated tube collectors for this application. I suggest using flat plate collectors with a harp- style absorber plate.