I am beginning the process to have someone add a humidifier to my existing HVAC unit. I currently have a Trane XL80 furnance controlled by a VisionPro thermostat (model TH8320U1008). My house is approx 2200 sf and located in the Washington DC area. Currently I am considering to have the Aprilaire 700 installed. Is it better to have a Honeywell IAQ added in order to control the entire HVAC system or am I better off using Aprilaire's fully automatic humidistat instead?