Honeywell VisionPro IAQ Programmable MultiStage Thermostat with Total Home Comfort - Includes Outdoor Temperature Sensor (YTH9421C1010) • Contains all features of standard VisionPRO, except arm chair programming. • Thermostat connects with Equipment Interface Module to control temperature, humidification, dehumidification and ventilation from a single point in the home. Only 3 wires run from thermostat to equipment interface module (EIM), making retrofitting an old thermostat a snap! • Can control whole house humidifier and automatically raises humidity levels throughout all rooms in the home, moisturizing air to prevent symptoms of dryness and to protect hardwood flooring and woodwork. • Can control whole house dehumidifier, and automatically lowers humidity levels through al rooms in the home, utilizing air conditioning or a whole house dehumidifier to prevent dampness, stickiness or odors; symptoms often associated with air that is too moist. Application - Conventional and Heat Pump systems Programmability - Universal Programming from 7 Day to Non-Programmable Changeover - Auto or Manual Color - Premier White Switch Positions (System) - HEAT-OFF-COOL-AUTO-EM.HEAT Switch Positions (Fan) - AUTO-ON-CIRC Power Method - Power supplied by EIM Terminal Designations - 1, 2, 3, C, R, Rc, Rh, R, W1-O/B, W2-Aux, W3-Aux2, Y, Y2, G, L, Out1, Out2, In1, In2, Dats1, Dats2, Hum1, Hum2, Dhm1, Dhm2, Vnt1, Vnt2 Dimensions (in.) - 4 9/16 in. high x 6 in. wide x 1 1/4 in. deep Dimensions (mm) - 116 mm high x 152 mm wide x 32 mm deep Electrical Ratings - 20 to 30 Vac Setting Temperature Range (F) - Heat: 40 F to 90 F; Cool: 50 F to 99 F Setting Temperature Range (C) - Heat: 4.5 C to 32 C; Cool: 10 C to 37 C Differential Temperature (F) - ± 1 F Differential Temperature (C) - ±0.5 C Stages - Up to 4 Heat/2 Cool Outdoor Sensor - Yes, optional Discharge Sensor - Yes, optional Remote Sensor -
 Excellent in every way, By EZ writer "Curmudgeon" (Huntersville NC) - See all my reviews This review is from: Honeywell YTH9421C1010 Visionpro IAQ Programmable Universal Thermostat (Tools & Home Improvement) This thermostat was included as part of my new dual heat system, which combines heat pump compressor with gas or propane furnace as the auxilary fuel.This is the best thermostat I have ever used. It can monitor and control up to 4 heat & 2 cooling systems, along with a humidifier and ultraviolet air purifier. The range of controls is astonishing. When you know the price of gas per therm and the cost of electricity per kwhr, you can set the thermostat to run the heat pump when it's most economically advantageous, then it will switch to the gas furnace when that fuel is the best economic choice (using the outside air thermometer to make its decisions) For a simple gas furnace or electrical AC system, it's probably overkill....you'll just never use all its capabiltites. But for multi-zone or multi-fuel systems with add ons like humidifiers or air purifiers, I highly recommend this thermostat....it will pay for itself in savings very easily! Warm and happy, This review is from: Honeywell YTH9421C1010 Visionpro IAQ Programmable Universal Thermostat (Tools & Home Improvement) We recently installed a Lennox Gp71 with this t-stat and are completely satisfied, warm and happy. That unit is well designed, works great, good user interface and easy to program. Finally, some engineers must have used a focus group or some panel of consumers because the thermostat makes sense and is easy to use. Set the temp and it stays right there. Combine that unit with a good variable speed modulating furnace and you will be warm and comfortable. The old thermostat was horrible with a single stage furnace. Noisy and full on or off while rattling the house. This new one is quiet and in my opinion, about as good a furnace and thermostat that money can buy. |
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