Product review (5 stars): Got it installed by a professional. I have an ...
Got it installed by a professional. I have an aprilaire 700 power humidifer. The humidifier needs to be powered on only when the furnance blower is on and for this, I had to order an Aprilaire 50 Sensing relay + AP 4655 Humidistat. Worked well for the 2014-2015 winter. Order parts online and pay for the labor. Works out much cheaper unless you know or have time to do it yourself and also save on labor.