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Connecting Dehumidifier and A/C to single 24V thermostat
I need to hire an electrician but first I want to see if what I'm proposing is theoretically possible, and also what parts I need to buy (the install is in a remote area so I'd like to have the parts on-hand).
Here's the situation. I have an air conditioning unit (110V) which is in the ceiling of my condo. It is in a very humid area, so management also installed a 110v dehumidifier in the same ceiling area. The dehumidifier doesn't have enough fan power on its own to really move the dry air into the room, thus it really is effective if it only runs when the air conditioner is running. What I'd like to do is have the dehumidifier only come on when the air conditioner is running (assuming the hygrometer humidity measurement indicates it needs to). I'd end up with these scenarios
1. Too warm & too humid - A/C turns on, dehumidifier gets power and also turns on
2. Too warm but not too humid - A/C turns on, dehumidifier gets power but doesn't turn on since it is not necessary
3. Cool enough but too humid - Nothing would turn on (very unlikely)
I'm thinking the 24vac from the thermostat would need to be split somehow to power both, but then I must need some relays and transformers to make the magic happen and not blow something up.