I have the Trane XV80 (80,000 btu) furance combined with a XL-14i (2.5 ton) compressor and Aprilaire 700 humidifier. The current controls are a single stage White Rogers theromstat and a manual control on the return air for the humidifer.
To maximize the system I want to upgrade to a better theromstat to take advantage of the 2 stage heat. I have talked to HVAC companies about the Honeywell Vision Pro IAQ model. For heat mode the theromstat seems perfect. But I get different answers regarding the ability to slow down the blower speed to dehumidify in the summer. Some sales people say it can be done and other say it can't because I don't have a dual stage compressor. Can the Vision Pro IAQ control the blower speed in cooling or will it operate as it does now, coming on low and speeding up after 7.5 minutes? Thanks.