Quote:
Originally Posted by BMWGUYinCO
Not quite. I installed a current sensing relay on the furnace live wire, not the fan live wire (those are two separate things).
This ensures the humidifier is only running when the furnace is on.
The fan operates 24/7/365 in stage 1 (low level speed), ensuring air circulation and more balanced temps across all 3 finished levels of our home.
When the furnace kicks on, then so does the humidifier and the fan then kicks into stage 2 (higher fan speed). When furnace shuts off, so does the humidifier, and the fan returns to stage 1 low level fan speed, but it is running continuously. So the fan, regardless of stage 1 or 2, runs independently of the humidifier.
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2 kinds of current sensing relays, line voltage and low voltage. If you put the relay on the thermostat wire for heating, thats the right way to do it. Humidifier will only run when calling for heat.