[RE-wrenches] Solar thermal covering

[Bradley Bassett]

One other thought, on some vacuum tube collectors, if I remember correctly,
you can simply remove some of the tubes.

Brad Bassett

On Sun, Jun 15, 2025 at 7:35 PM Bradley Bassett <bbassett2 at gmail.com> wrote:

> When I found that my system was somewhat oversized, I plumbed in a mixing
> valve and a heat dump radiator (a few Cu pipes) in the crawl space to dump
> the heat. It's on the solar supply line and it works like a charm. It
> actually adds a very modest amount of heat to the crawl space, not enough
> to notice. It's going on 20 years without any issues, probably because it's
> an anti-freeze system so no mineral buildup in the mixing valve. I've also
> heard of using a fin radiator under the eve for this instead of the crawl
> space. The crawl space was easier for me.
>
> Brad Bassett
>
> On Sun, Jun 15, 2025 at 5:02 PM david quattro via RE-wrenches <
> re-wrenches at lists.re-wrenches.org> wrote:
>
>> There must be a variable mixing valve that is informed and controlled by
>> a thermocouple
>>
>>
>>
>> On Sun, Jun 15, 2025 at 4:46 PM Jay via RE-wrenches <
>> re-wrenches at lists.re-wrenches.org> wrote:
>>
>>> Hi all
>>>
>>> I’ve inherited an incorrectly sized solar thermal evacuated tube system.
>>> It’s too many tubes for the use most of the year.
>>>
>>> Does anyone know of a design or product that can remotely cover them?
>>> I can find shade cloth of course that I can cover them but something
>>> remote control would be better
>>>
>>> Thx
>>> Jay
>>>
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