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 < [email protected]> 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 < > [email protected]> 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 >> >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> Pay optional member dues here: http://re-wrenches.org >> >> List Address: [email protected] >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> There are two list archives for searching. When one doesn't work, try the >> other: >> https://www.mail-archive.com/[email protected]/ >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> http://www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> http://www.members.re-wrenches.org >> >> _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/[email protected]/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org > >
_______________________________________________ List sponsored by Redwood Alliance Pay optional member dues here: http://re-wrenches.org List Address: [email protected] Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org There are two list archives for searching. When one doesn't work, try the other: https://www.mail-archive.com/[email protected]/ http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
