[RE-wrenches] tankless hot water and pumping question

[Ian Woofenden]

Hi Todd and all,

Since this is a renewable energy list, I think it's worth mentioning 
that installing a modulating demand heater will make the installation 
"solar ready".

I'm only aware of one tankless heater that accepts pre-heated water 
and has no electrical usage, and that's the Bosch 1600PS (which I 
live with). I'd love to know if there are others, since this is a 
common need in off-grid systems. Some of the other modulating heaters 
on the market have significant electrical demand, which is a deal 
breaker for us poor off-gridders.

Ideally, we'd have such a unit that doesn't have a standing pilot, 
but I've never heard of such a product, though there are 
non-modulating heaters that run on piezo igniton and a couple of 
D-cells. Bosch's hydro unit is a neat concept, but it's not 
modulating.

I hope others will share their knowledge and experience.

Ian


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Ian Woofenden <ian.woofenden at homepower.com>, Senior Editor, Home Power magazine
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