I’m looking for ideas on how to replace a bunch of two-wire dumb, heat-only thermostats with “smart” thermostats.
- The existing wiring is two-wire, and it would be extremely challenging to run additional wires to most of the locations.
- The current stats are KEL-T201 (powered by a small battery) to display the temperature or setpoint, and only have
- The stats control a whole-house radiant-floor heating system. I don’t understand all the plumbing involved (see picture), but the current stats are used to control valves connected to a manifold (the white cylinders in the upper right corner of the picture) when that area of the house needs to be warmer.
I would like to replace all these stats with something “smart” so the temperatures can be adjusted up/down on a schedule, and ideally, integrated in to openHAB.
I’ve thought about using something like the Fast-Stat Common Maker but I’m not sure what smart thermostats would be cost-effective to use with it? Also, it’s unclear if I’d need a separate Common Maker for each stat (which would add significant cost on top of each smart stat), or if it could be shared with multiple thermostats?
Open to any suggestions! Thanks in advance.