April Aire makes a dehum that installs to ur return duct , and remember if u really are looking for a good humidifier i would look into steam. In my opinion its the only kind that works, the other kind just dont work and are a waste of money. I do not even put them in anymore.
Hvac tech and Mechanic
15 yrs field exp/5yrs supervisingexp/ Nate and Epa cert.