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Honeywell VisionPro IAQ Programmable Universal Thermostat with Outdoor Sensor

Honeywell VisionPro IAQ Programmable Universal Thermostat with Outdoor Sensor

About This Thermostat

MFG: Honeywell
MFG#: YTH9421C1010
Our#: 173447
Programmable: Yes (7 day or non-programmable)
Stages: 4H & 2C
System Compatibility: Multi-Stage, Heat Pump, Single Stage, Heat Only
Power Options: 24 VAC Hardwire
Heat/Cool Changeover: Automatic or Manual
Programmable Fan: Yes
Temperature Limits: Yes
Keypad Lockout: Yes
Backlight: Yes
Vacation Hold: Yes
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 - Yes, optional
Sensor Element - Thermistor
Currents (Heating) - 1.0 A running
Currents (Cooling) - 1.0 A running
Currents (Fan) - 0.6A running
Operating Humidity Range (% RH) - 5 to 90% RH, non-condensing
Includes TH9421C1004 Thermostat and THM5421C1008 Equipment Interface Module and C7089U-1006 Outdoor Sensor
Comments - Includes Humidification Control with or without Frost Protection, Dehumidification using Whole House Dehumidifier or Air Conditioning with High or Low speed fan, Advanced Patented Ventilation Control and Advanced Dual Fuel Heat Pump Control.
Humidification Setting Range - 10 to 60% RH.
Dehumidification Setting Range - 40 to 80% RH.

ProThermostats.com Price:

$242.95

Regular $479.00, You Save $236.05 (49%)
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REVIEW SNAPSHOT®

by PowerReviews
Honeywell VisionPro IAQ Programmable Universal Thermostat with Outdoor Sensor
 
4.5

(based on 11 reviews)

100%

of respondents would recommend this to a friend.

Pros

  • Easy to adjust (11)
  • Easy to install (9)
  • Intuitive controls (9)
  • Simple controls (7)

Cons

    Best Uses

    • Central controls (8)
    • Home (8)
      • Reviewer Profile:
      • Homeowner (10), Avid do-it-yourselfer (7)

    Reviewed by 11 customers

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    Displaying reviews 1-10

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    5.0

    A winner!!

    By Monty

    from Detroit MI

    About Me Handyman, Homeowner

    Verified Buyer

    Pros

    • Easy To Adjust
    • Easy To Install
    • Intuitive Controls
    • Precise Controls

    Cons

      Best Uses

      • Central Controls
      • Homes
      • Large Rooms
      • Offices
      • Small Rooms

      Comments about Honeywell VisionPro IAQ Programmable Universal Thermostat with Outdoor Sensor:

      We'd bought this unit online to control a new furnace and ac. I also wanted to control the humidifier as well as have the humidity levels displayed on the thermostat. The local company that installed the furnace and ac did not really understand the installation or setup of the Honeywell thermostat, and was a little hesitant about the unit but together we got all the wiring done. Now, it's been installed for a few weeks and my initial impression is that this thermostat is really worth the small amount you'd pay versus a basic thermostat. The controls are very easy to follow, and the setup takes a few passes to set all the functions; everything works great. Only issue I did have was the outside temp sensor. The installer mounted in on the outside of the house near the ac unit, in the early morning the sun shines directly on the sensor making the temp reading increase by some 30 degrees. The instruction recommend the sensor placement under the gutter or under the eve, anywhere where the sun will no directly shine on the sensor. In my home I would have been impractical, so I mounted the sensor behind a large bush inside of a small plastic junction box. Now the readings are always correct. Overall this is a pretty nice setup. And the thermostat looks great on the wall.

       
      5.0

      Excellent product!

      By Jim B.

      from MA

      About Me Handyman, Homeowner

      Verified Buyer

      Pros

      • Easy To Adjust
      • Easy To Install
      • Easy to use
      • Intuitive Controls
      • Pleased With Displays
      • Precise Controls
      • Simple Install

      Cons

        Best Uses

        • Central Controls
        • Homes

        Comments about Honeywell VisionPro IAQ Programmable Universal Thermostat with Outdoor Sensor:

        Very pleased how this controls the HVAC in the home now. I also want to add the fresh air component to assist. No issues at all!

         
        4.0

        I returned mine

        By jpbpe

        from Naples, FL

        About Me Homeowner

        Verified Buyer

        Pros

        • Easy To Adjust

        Cons

          Best Uses

          • Central Controls
          • Homes

          Comments about Honeywell VisionPro IAQ Programmable Universal Thermostat with Outdoor Sensor:

          I use this thermostat in my principle residence and it works very well. I ordered this one for my winter place in FL, but returned it because it was not a new/unused unit.

           
          5.0

          This is the one!

          By greentreefrog

          from Wisconsin

          About Me Handyman, Homeowner

          Verified Buyer

          Pros

          • Easy To Adjust
          • Easy To Install
          • Intuitive Controls
          • Precise Controls

          Cons

            Best Uses

            • Central Controls
            • Homes
            • Large Rooms
            • Offices
            • Small Rooms

            Comments about Honeywell VisionPro IAQ Programmable Universal Thermostat with Outdoor Sensor:

            Just buy it! this is the one that does it all.

             
            4.0

            Honeywell Vision Pro Thermostat

            By H

            from Mocksville N.C.

            About Me Homeowner, Professional

            Verified Buyer

            Pros

            • Easy To Adjust

            Cons

            • Some difficulty in progra

            Best Uses

            • Central Controls
            • Homes

            Comments about Honeywell VisionPro IAQ Programmable Universal Thermostat with Outdoor Sensor:

            My comment concerns the supplier performance. Service was excellent, courteous and efficent. I would and will purchase from this supplier as the needs occur.

            Thanks,
            H

            (2 of 2 customers found this review helpful)

             
            4.0

            Nice modular design

            By Seth

            from Hanahan, SC

            About Me Handyman, Homeowner

            Verified Buyer

            Pros

            • Easy To Adjust
            • Easy To Install
            • Intuitive Controls
            • Precise Controls

            Cons

              Best Uses

              • Central Controls
              • Homes

              Comments about Honeywell VisionPro IAQ Programmable Universal Thermostat with Outdoor Sensor:

              The remote outdoor sensor is nice. I installed this thermostat downstairs where we spend most of our time. I can quickly see what the outdoor temperature is. I also installed a radiation shield to house the sensor. If direct sunlight hits it, it will read 20 or so degrees higher than air temp (true for all temp sensors). I also purchased the remote indoor sensor and installed it at the original thermostat location upstairs, configuring the thermostat to average between itself and the indoor sensor.

              Cool features:
              - Can set dehumidify control without a dehumidifier by running the A/C (may go up to 3 deg below set point).
              - Capability to control ventilation, humidifier, dehumidifier, and multiple systems/zones, although I only have 1heat/1AC (auto detects all connected equipment).
              - Can quickly and easily modify a scheduled time period's properites. For instance, if I know I'm coming home earlier than usual today, I can change my arrival time with about 3 taps of the screen. Very intuitive. Other programmable thermostats I've seen have clunky interfaces and discourage modification for fear of messing something up.
              - Can modify multiple days to have the same schedule (not just copy previous day). You actually select each day from the list at the top of the screen. Pretty Cool.
              - I like the Equipment Interface Module. Makes modifications/additions/deletions of equipment fairly easy (once you run the cable, of course). Note: This thermostat cannot be used without the EIM, as it only has 3 wires. Everything connects to the EIM rather than to the thermostat.
              - Can set the filter reminder after either a certain number of calendar days, or a certain number of runtime days.
              - Always-on backlit screen. Dims after 30 seconds so you don't have to tap the screen to see it in the dark.

              Cool features it COULD have:
              - Wish you could view indoor humidity from the main screen while using remote sensor. You have to tap the 'more' button. Not a big deal, but would be nice.
              - Wish it also had outdoor hygrometer capability. In the south in the summertime, outdoor humidity information is extremely important.

              For a thermostat, this thing goes above and beyond. I wanted more weather station-like functionality, but I'm pleased with it overall.

              (3 of 3 customers found this review helpful)

               
              5.0

              I am very happy with this purchase

              By Mech. Eng.

              from Auburn, NE

              About Me Engineer, Handyman, Homeowner

              Verified Buyer

              Pros

              • Easy To Adjust
              • Easy To Install
              • Intuitive Controls
              • Precise Controls

              Cons

                Best Uses

                • Central Controls
                • Homes

                Comments about Honeywell VisionPro IAQ Programmable Universal Thermostat with Outdoor Sensor:

                Recommend downloading the Technical Product Data [...]. It contains information that explains how set up selections affect other settings that isn't contained in the installation instructions shipped with the thermostat.

                 
                5.0

                You will not be disappointed

                By pineymtnva

                from Charlottesville, VA

                About Me Handyman

                Verified Buyer

                Pros

                • Easy To Adjust
                • Easy To Install
                • Intuitive Controls

                Cons

                  Best Uses

                  • Replacement for old unit

                  Comments about Honeywell VisionPro IAQ Programmable Universal Thermostat with Outdoor Sensor:

                  This is the third unit of this type I have installed. No greater complement can be had than the service tech installing this unit saying it is great. He has seen a lot and this one is his favorite. It is great especially the humidity control. Don't waste your money on cheap units or really expensive ones. This is a great value for the money. Great company to purchase from as well. [...]

                   
                  4.0

                  Great Product but forget support fm Mfgr

                  By Ron - Retired Instrument Engineer

                  from Kansas City

                  About Me Handyman, Homeowner

                  Verified Buyer

                  Pros

                  • Easy To Adjust
                  • Easy To Install
                  • Intuitive Controls
                  • Precise Controls
                  • Versatile Product

                  Cons

                  • Factory Support

                  Best Uses

                  • Homes
                  • Small Commercial Offices

                  Comments about Honeywell VisionPro IAQ Programmable Universal Thermostat with Outdoor Sensor:

                  Tied in AC w/dehum control, 2-stage furnace, dehumidifier, 2nd thermostat in basement, and outdoor temp sensor. Circulate mode for fan with 2nd sensor in basement does a pretty good job keeping the temperature difference between main floor and basement reasonably close.

                  Biggest problem is Honeywell refusing to talk to anyone but a licensed HVAC technician.

                  Manual fails to describe how to program dehum contacts for normally open and normally closed settings. To get full functionality for dehum where N.O. contacts reduce AC fan speed and still allow the thermostat to pull temp below the set temperature (up to 3 deg F) for further dehumidification, I will have to add a SPDT relay. The relay will allow me to convert the dehum N.C. contacts to N.O. as required by my Kenmore unit.

                   
                  4.0

                  Good value for integrated controls

                  By Grayhair

                  from Minneapolis, MN

                  About Me Homeowner

                  Verified Buyer

                  Pros

                  • Easy To Adjust
                  • Easy To Install
                  • Intuitive Controls
                  • Precise Controls

                  Cons

                    Best Uses

                    • Central Controls

                    Comments about Honeywell VisionPro IAQ Programmable Universal Thermostat with Outdoor Sensor:

                    I was very impressed on the ability to integrate humidifiers, dehumidification, ERV ventilation and heating. There are plenty of options to use when setting up the controls. It did take a fair amount of time to wire up and check out circuitry Thiswould not be good for an average homeowner without some controls and electrical experience that justs wants to connect 4 wires at the themostat.

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