Review on 💨 Reliable Emerson 90-290Q Fan Relay SPST for Efficient Air Control by Dave Giri

Did exactly what it took me to control my Aprilaire 400M humidifier, using the signal cable from the Nest humidifier control cable and connecting it so that the 24th day -V transformer can properly control the humidifier water supply magnet. The only reason I don't give it five stars is that it makes a slight buzz when turned on after the heater has been turned on during its cycle. I've noticed that the sound has dropped a bit since first installing it 2 months ago, but it's still weak. Definitely worth the money for my nest to be able to control humidity levels in the house.