I am installing a Aprilaire 700 Humidifier on a Goodman GMNT gas furnace the Furnace control board is a white rogers 50T 35-730 it has separate hum 24v Terminal and hum 120v terminal the Aprilaire 700 Humidifier includes a built in 110v to 24v transformer which one should I connect it to and also...

I installed Aprilaire 700 humidifier on my furnace - American Standard Freedom 90 Single Stage but I don't know where I can connect 24V from humidifier control panel in furnace. I'll appreciate your help. YP

I was just quoted on a 2nd floor A/C replacement, condenser and var speed blower, 2 1/2 ton Trane XR13 with upgrade options. Live in CT Are these prices sane ? Includes removal of old unit, upgrade of refrig line, added insulation on old ductwork - work to be done in walkup attic Quote...

Lennox furnace doesn't work after changing out thermostat to an Aprilaire model 8870 communicating thermostat. Have triple checked the most obvious and wiring at both ends. Furnace powers up but will not ignite. Have changed out the new Aprilaire for another exact model. Still no luck! ...

I just installed an Aprilaire 550 humidifier on my Goodman furnace but can't figure out how to wire it. The furnace has a control board which has a 24 volt HUM terminal. My humistat has two terminals. I am looking for a very simple explanation on how to wire this thing up.