Hi experts,

I have installed Aprilaire600 but I don't see any rise in humidity in my house.
Unit installed on Supply side.
hot air coming from duct. (before it was coming from return)
Hot water (running steady)
unit is functioning properly but the humidity level is below 20%.
I have set the controller knob on 7th (max) in Maunal mode.

Can you please suggest what I have done wrong ? here is the pic.

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