Don’t do this, a cheap non-programmable thermostat is a better option and inexpe... | Hacker News

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xnyan 5 months ago | parent | context | favorite | on: Breaking down a record-setting day on the Texas gr...

Don’t do this, a cheap non-programmable thermostat is a better option and inexpensive.

Scoundreller 5 months ago [–]

Wire them both up so that your cheap thermostat provides hard upper and lower limits.

Your HVAC doesn't care where it gets a 24V signal. An open relay won't mind being energized from the "wrong" direction. AFAIK, thermostats won't tattle.

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