Hello, We recently moved into this home. The system has 4 zones, gas force air with central air that is original to the home so 20 years. I have a few questions maybe someone can assist with. 1. I was walking checking the returns to see if i could feel they were drawing air in. I couldn't tell by feeling. Is this normal and if so, is there another way to confirm they are working? What triggered this was we turned the fireplace on on the main level and the upstairs was hot so was hoping it was pulling that back into the system and recirculating. 2. I noticed when looking at the furnace where the returns come into the system it is like a cardboard type material that seems to form the box for the return. is that normal? There were some 1/8" gaps between it so not sure if that is making it less efficient. 3. It seems that if i turn the fan on in one zone the fan comes full on at the furnace. It seems if that is the case i should just as well have it working on all zones? 4. If the above is accurate, is there a way to control all zones from a single location? Thanks for the help.

HI Folks, I have an April Aire 600 Humidifier and a Carrier 59TP6B Furnace and the wiring diagram that came with the Humidifier does not work. It is straight forward but I must be missing something, I have the Model 60 Humidistat, does anybody have a good wiring diagram for me. Any help is much appreciated as AprilAire offer no support at all. This Diagram Produces No Result, no voltage is sent to the Solenoid. [color=#222222]R -------------------------R[/color] [color=#222222]C--------------------------COM 24V------------------------S W-------------------------W/W1 gf (not used) G (not used) H--------------------------HUM 24V H------------------------------------------------------------S ODT---outdoor sensor ODT---outdoor sensor[/color] Thanks Rich