[RE-wrenches] Solar thermal covering

[Jerry Shafer]

Wrenches, Jay,
Yup had this same issue years ago and we used fire doors, like roll up
doors but lighter smaller and less expensive. But that was years ago.
Fun times

On Sun, Jun 15, 2025, 7:35 PM Bradley Bassett via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> 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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