The dehumidification feature on our Prestige thermostat (using the AC with a low* speed fan) requires that a connection be made between the thermostat and a dehumidification terminal on the equipment for low speed fan operation. This connection is currently not wired and consequently this feature is not working. * In our case, I assume we want medium speed as opposed to low or high speed. My understanding is that low is mainly used during startup and shutdown with an ECM blower. Does this terminal exist on a WF All-In-One Envision dual stage unit with ECM? I see a wiring schematic in the installation manual, but not sure how to read it. I can do this type of wiring if I know exactly what to wire. If there is no such terminal, is there other way to connect this? Could the 3 accessory terminals help somehow? Below is a link to the Envision manual. I’m looking at page 27: http://www.waterfurnace.com/Envision/pdf/IM1585.pdf I have the same question for a split unit. How could this be wired as well? Would this terminal be located in the compressor section or in the air handler section? In case anyone needs to see it, here is a link to the Prestige manual. Please see the middle of page 7, on the right hand side of the page for the wiring instructions that I am referring to. http://www.forwardthinking.honeywell.co ... 057efs.pdf Any help would be greatly appreciated. Thanks P.S. I am aware of the WF dipswitch that reduces the fan speed by 15% in AC mode. Not interested in going that route as I would rather use the thermostat if possible.