Fireplace Dry Contact + Two Switches?

[rontalley]

This is what I did:

Fireplace automation?

Hmm, didn’t think about all of the bad things mentioned above when I did mines. Since my fireplace has a switch to control the gas valve on/off (no 120v) and a switch to control the fan (120v), I wired a 120v to 24v transformer from the outlet (powered by the fan switch) and a 24v coil relay from that to open and close the gas valve circuit (basically another switch in parallel with existing switch). I connected a smart switch to the fan (120v) which allows me to turn on/off the fan (smartly). So when the fan is supplied power, the transformer sends 24v to the 24v coil relay which closes the circuit which opens the gas valve. When the switch is off the relay opens which turns off the gas valve switch… This is a 100% mechanical process. The actual fan, which is clueless of th…