VisionPro IAQ Thermostat & Module Zoom

VisionPro IAQ Thermostat & Module

SKU:YTH9421C1002

Brand: Honeywell

Honeywell
Qty Price
$228.03
/ each
In Stock! Ships in 24-48 Hours
(20 Available)
3

Specs

Application: Multi Stage (Heat/Cool)
Heat Pump
Stages:
?
4 Heat/2 Cool Heat Pump
3 Heat/2 Cool
Programmability: Programmable
7 Day
User Interface: Touchscreen
Mount: Horizontal
Options: Fan Control
Auto Changeover
Works with Sensor
Large Display
Power Method: Communicating
Changeover: Manual
Auto
Temperature Range (F): 40°-99°F
Max Temp Differential: 1°F
Operating Humidity: 5 to 90% RH
non-condensing
Voltage:
?
Low voltage
Amperage:
?
0.6-1
Wattage:
?
12 to 30
Wiring: Rc
L
C
Dhm2
Vnt1
Vnt2
G
1
2
Rh
R
Y2
Y
3
Color: Premier White
Height: 4-9/16"
Width (Inches): 6"
Depth (Inches): 1-1/4"

Description for Honeywell YTH9421C1002

Overview

The Honeywell TH9421U touch screen universal programmable thermostat provides electronic control of 24 Vac heating and cooling systems of 750 mV heating systems in addition to humidification dehumidification and ventilation.

Features

  • Contains all features of standard VisionPRO, except arm chair programming.
  • Thermostat connects with Equipment Interface Module or EnviraZone panel to control temperature, humidification, dehumidification and ventilation from a single point in the home.
  • Automatically raises humidity levels throughout all rooms in the home, moisturizing air to prevent symptoms of dryness and to protect hardwood flooring and woodwork.
  • Automatically lowers humidity levels through all 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.
  • Removes air pollutants by exchanging the stale air in a house with fresh, filtered air better than having an open window.

VisionPro IAQ Thermostat & Module

REVIEW SNAPSHOT®

by PowerReviews
HoneywellVisionPro IAQ Thermostat & Module
 
4.9

(based on 20 reviews)

Ratings Distribution

  • 5 Stars

     

    (18)

  • 4 Stars

     

    (2)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Reviewed by 20 customers

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Displaying reviews 1-10

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5.0

Great Thermostat

By Bill

from Newbury Park, CA

Verified Buyer

Comments about VisionPro IAQ Thermostat & Module:

I have been looking to replace a failed Totaline Thermostat that would control the Carrier gas heating/AC system in my home along with the whole house humidifier. I have tried several other models including a replacement unit from Totaline(the original model Intellistat has been discontinued) but none of them would allow me the flexibility to control a powered humidifier when the system called for heat while continuing to give me the option to use the humidifier with the furnace blower to raise humidity levels without heat when needed. I had the local HVAC guys who installed the system several years ago come out twice only to tell me it could not be done(while charging me $180 dollars!). I scoured the Internet to find a thermostat/humidistat with the ability to manage this task and came across this wonderful unit. After reading the specs and other reviews, I ordered from PEX online due to their outstanding reputation and return policy and am thrilled to say this little guy works perfectly! I installed the unit and interface module myself in about 30 min, programmed it using the easy to follow setup instructions, and voila! It works perfectly, it's easy to read given the large backlit display and I now have full control over my heating, AC and humidity all in one package!

 
5.0

nice piece of equipment

By old E.E.

from kansas

Verified Buyer

Comments about VisionPro IAQ Thermostat & Module:

easy to program, very easy to install, saves money

 
5.0

A necessity to your high effiency system

By Lindquist Electric

from Upton, MA

Verified Buyer

Comments about VisionPro IAQ Thermostat & Module:

Great product. Was simple to install and program. Only took two hours from beginning to end. I even had to run a new wire to my T stat location because it's currently only doing 1 stage heat (2 conductors) so I needed 1 additional conductor. The fact that all the accessories or features are wired at the module makes it a clean install and easy to add to. It's currently controlling a humidifier and 2 stage furnace and is equipped with the outdoor sensor which is a must. Will be doing AC soon and possibly a heat exchanger. Will be easy to add to programming.

 
5.0

Great product and great price from Pex

By Bill J.

from Chicago

Verified Buyer

Comments about VisionPro IAQ Thermostat & Module:

HVAC contractor installed, same 3 wires as original thermostat, separate box mounts at furnace, complements Carrier ICS Infinity furnace perfectly. Benefits of thermostat are useless without outdoor temperature sensor, must have

 
5.0

Would buy this again

By Brad

from Indianapolis, IN

Verified Buyer

Comments about VisionPro IAQ Thermostat & Module:

I bought this thermostat because I wanted to replace our existing themostat with something that could control both the furnace and and humidifier. It took a little time to get all of the settings right, but so far it's worked great. The only drawback is that since this model doesn't come with the outdoor temp sensor I have to manually adjust the humidity when the temperature drops to keep condensation off the window panes.

 
5.0

I would buy this product again

By trigger

from kansas city ks

Verified Buyer

Comments about VisionPro IAQ Thermostat & Module:

more accurate control of temp than a old mercury style thermostat

 
4.0

There's good and bad

By Evan

from Prior Lake, MN

Verified Buyer

Comments about VisionPro IAQ Thermostat & Module:

I purchased it to control the heating, air conditioning AND an HRV. The heating subcontractor said no one makes such a thermostat. That's not his only error, and I'm still fixing things.

GOOD: Great display, easy to set

BAD: The painter bumped it and it fell and broke. When you remove it from the box it comes apart hard - but on the wall it doesn't hold together as well. I bought another unit and loosened the back plate on the wall and the main module is holding better. (the screws had bowed the back slightly)
I have not connected the HRV yet.
It probably has an "anticipater" function - I want more differential action.

I'm assuming that most of the problems are mine and the added ignoramce of the heating sub.

 
5.0

Tough installation - great device.

By Wings

from Collierville, TN

Verified Buyer

Comments about VisionPro IAQ Thermostat & Module:

I bought this to operate a furnace, air conditioner and whole-house humidifier. It does all this well. You can progam the heating and cooling for individual days and set the desired humidity. It also has options for outdoor and additional indoor temperature sensors. The problem is that Honeywell does not want individuals installing this product but only approved contractors. The literature they give to contractors instructs them to use the device to sell additional equipment such as humidifiers/dehumidifiers etc which the device can control. The installation instructions are very minimal so you need to have some knowledge or assistance to get this up and running. The wall thermostat is simple enough but hooking up the control module to the various equipment you want to control can be a challenge depending on what you have. Using some online DIY forums and some trial and error I got things working without causing any damage. I needed to buy some thermostat wire in order to complete all the connections from the control module to the existing circuit board. The only problem is the backlight on the thermostat works only intermittently. I contacted Honeywell but other than telling me to check the connections they only would say hire a professional installer. I recommend taking good notes on all your existing connections prior to installing this so you can go back to where you were if you don't get it right. The major challenge for me was getting the humidifier (which was professionally installed) functioning properly. In retrospect I should have bought this thermostat first then had the humidifier installed. It took me several hours but I got everything functioning correctly though I don't have any HVAC experience.

 
5.0

The best price [...]

By okutlu

from Atlanta, GA

Verified Buyer

Comments about VisionPro IAQ Thermostat & Module:

First of all I have to admit that I'm one of the stupid persons who has thought that all thermostats are same. So why I would shell out $$$ to a digital t-stat as any other may do the same job. Actually this may be a right thought process if you would like to shell out your $$$s to the gas company as well as compromising your comfort level. This is what I have done for last three years until I've understood the value of having a heat pump as well as understanding a heat pump is a pain in the butt without a very smart thermostat. If you have a heat pump, and want to maximize your your comfort level, VisionPro IAQ is the way to go. This product is one of the best value for my money I spent on. VisionPro IAQ also helped tremendously to accommodate comfortable humidity level at my home even though I had a digital humidistat from another respectable brand. Installation is very easy thanks to smart design of the IAQ. I'm so glad to get the best t-stat with a very good price [...]

 
5.0

WORTH IT!!!

By dramman2

from Farmington, MN

Verified Buyer

Comments about VisionPro IAQ Thermostat & Module:

Bought this because:
-7-day programable (You can set WAKE, LEAVE, RETURN, SLEEP temperature settings everyday)
-Touch screen
-Controls my Aprilair Humidifier and can set my humidity level(manual previous)
-Can set to recirculate air to keep more even temp on multi-levels
-Can control zone heating/air
-Outside Temp displayed on thermostat with sensor
-Furnace and humidifier filter reminders (you set the days and it tells you based on days of use)
-No extra wires run to thermostat
-Very user friendly and gives user a lot of optional preferences during set-up like screen light on always or on touch, etc.
-Too many features to list

Only negative, my installer said these don't work that well to control the Air Exchangers and recommended to leave that controlled as it is. This unit only allowed it to either be on an on/off cycle switching every 20minutes or manual on/off. Air Exchanger control already on the wall and it works by it self the way it should so just left it. Also, installer mentioned not to use "frost protection" on unit when controlling a humidifier as in his experience it never turned the humidifier on so just disable that feature on set-up and it'll just set the humidity level % to what you desire like 35%.

I see this unit now all the time in commercial buildings but works great in residential too.

I did hire a professional to install as I thought I could do it as I'm very handy at a lot of things but did not want to screw it up in the dead of winter plus it looked like a larger project than I wanted to tackle. Took installer 2 hours to install with an outdoor sensor. Make sure they've installed this unit before as it is more technical than others. He had my furnace panel off and wires run from it to the Module as well as wires from thermostat, outdoor sensor, and humidifier to the module so think about hiring a pro as recommended.

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Q&A: Ask the Questions, share answers

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8 Questions | 13 Answers
Displaying questions 1-8
  • VisionPro IAQ Thermostat & Module

    Q:

    Hi, I have this unit installed with a humidifier and outdoor temp sensor. Set up was easy and I'm happy with the overall product. I have two questions.
    1. I'm using the humidity sensor in the t stat itself but I notice that the humidity is always above 58% even though it is extremely dry in the house. This only gives me 2% to work with as I can't set the humidity any higher than 60%. Is there any way to calibrate the humidity sensor on the stat or increase the desired humidity.
    2. The right side of the t stat display is dimmer than the rest of the display particularly in the bottom right corner. It almost looks rippled. Is there anything I can do about this?

    Thanks,
    Asked on 12/1/2011 by Johnny from Upton, MA

    3 answers

    • A:

      You should be able to calibrate the sensor based on the instruction manual. However, it may turn out that the sensor is not picking up the humidity properly and might need to be repaired as well with the display issue.

      Answered on 12/12/2011 by Anonymous from None
    • VERIFIED BUYER

      A:

      Hi Johnny, from my experience with this unit, the humidity levels indicated on the thermostat match the levels of an independent wireless thermo/hygrometer I compared it with. I don't notice any difference in the uniformity of the display or a "rippled" corner. I know you can calibrate both the temp and humidity levels in the setup but it almost sounds like there may be something wrong with your unit as 58% humidity is actually pretty high in my opinion. Generally 50% is about right and certainly shouldn't feel dry. I'm happy with mine set about 40%. Maybe you should try and exchange it if it's still under warranty. Good luck.

      Answered on 1/18/2012 by Bill from Newbury Park, CA
    • VERIFIED BUYER

      A:

      Have you verified that your indoor humidity is what the unit has displayed? 58% is quite high for indoor, especially in the winter.I am not aware of any humidity calibration for the unit. I would think if it is innacurate it has failed, especially if the display is having problems since their is an internal voltage regulator that may of failed causing the humidity problem also.

      Answered on 1/17/2012 by old E.E. from kansas
  • VisionPro IAQ Thermostat & Module

    Q:

    My humidifier is not running enough to reach my desired humidity level because my furnace is oversized for my house and does not run with a call for heat long enough for the humidifier. I need a thermostat that will turn the humidifier and blower on without heat. Will this system do that?
    Asked on 2/2/2011 by Clint from Salt Lake City Utah

    2 answers

    • CUSTOMER CARE

      A:

      The manufacturer suggests using the YTH9421C1010, as this model uses the Frost Protection feature too. It has an option to bring on the fan without a call for heat to humidify. Please use ISU #374 setting #1 - see page 4 of the installation instructions ( http://s3.pexsupply.com/manuals/1249544894162/Honeywell_YTH9421C1002_Install_Guide.pdf ).

      Answered on 3/8/2011 by PexSupply Staff from NY
    • VERIFIED BUYER

      A:

      There is a setting in the installation programming that you can change that will force the fan on when the house needs humidity. You may want to run hot water to the humidifier to increase it's performance since the air won't be heated.

      Answered on 2/16/2011 by Brad from Indianapolis, IN
  • VisionPro IAQ Thermostat & Module

    Q:

    With an outdoor sensor installed, frost control enabled, and a humity setting of say 45%, will the thermostat raise and lower the actual indoor humidity based on the outdoor temprature?
    Asked on 1/30/2011 by RCE from Seattle

    1 answer

    • CUSTOMER CARE

      A:

      It will if you are using the scale displayed on the thermostat for the frost protection. The humidity will be reduced when the outdoor air temperature is low and could possibly add too much moisture to the home. Once the outdoor temperature again rises, the humidity will increase to the selected set point.

      Answered on 2/3/2011 by PexSupply Staff from NY
  • VisionPro IAQ Thermostat & Module

    Q:

    Do you have instruction for the proper usage of the thermnstat?
    Asked on 1/29/2011 by Arnie from NYC

    1 answer

  • VisionPro IAQ Thermostat & Module

    Q:

    What settings in the Thermostat do i use to make the fresh air ventilator come on and off (HR105B)in the program and also for the Dehumifier TrueDry DH65.
    Asked on 1/26/2011 by Ski from Forestville,MD

    1 answer

  • VisionPro IAQ Thermostat & Module

    Q:

    Hi, I am generally very pleased with the thermostat. However, I live in Calgary and the temperature at the moment is -30C - and the bottom ledges of my windows have frozen, just like last winter when I didn't have this thermostat. The frost setting was at 5 prior to the start of the cold weather and I have turned the setting down to 3, to no avail. There is no help in the manual as to where the setting should be. Please advise.
    Asked on 11/23/2010 by Andy from Calgary. Alberta

    3 answers

    • CUSTOMER CARE

      A:

      First, press MORE until the humidifier screen is displayed. Next, press sort to set the Humidity and Frost Control.

      When using Frost Protection, if frost or conden­sation appears on the windows, lower the frost setting. Wait at least 1 day before adjusting the frost level again. Once frost no longer appears, the thermostat will control humidity to the maximum level without frosting or fogging win­dows and without further adjustments.

      Press DONE to save and exit or press CANCEL to exit without savings the changes. Please note that if you do not have an outdoor temperature sensor, the Frost Control level will not be displayed.

      Answered on 12/7/2010 by PexSupply Staff from NY
    • VERIFIED BUYER

      A:

      My installer said to turn the frost protection feature off and just set a constant humidity level like 35%. He said, with frost protection on, sometimes the humidifier wouldn't even turn on so just adjust the humidity level to a level that doesn't frost your windows. Also, recommended outside air temp sensor.

      Answered on 12/28/2010 by dramman2 from Farmington, MN
    • VERIFIED BUYER

      A:

      I guess your question is about the humidity setting of the IAQ. Unfortunately there is no clear description about the frost control setting. Basically the setting is from 1 to 10 which the 1 is less humidity and the 10 is the highest humidity in accordance with the outdoor temperature. I assume that you already have a outdoor temperature sensor installed with your IAQ t-stat. In your case the best you can do is lower the frost setting and wait for a day or two to see the result. If the frost setting 3 doesn't work for you you can use lower settings or you can reduce overall humidity setting. Do you have a a reference humidistat to compare the humidity reading of the IAQ? A reliable humidistat may help you to see the actual humidity level of your house. So You may calibrate IAQ'a humidity measurements according to the reference humidistat in order to avoid with a high humidity at your house.

      Answered on 1/2/2011 by okutlu from Atlanta, GA
  • VisionPro IAQ Thermostat & Module

    Q:

    what is L terminal for
    Asked on 10/2/2010 by Anonymous

    1 answer

    • CUSTOMER CARE

      A:

      It is an input terminal for the Heat Pump Equipment Monitor.

      Answered on 10/4/2010 by PexSupply Staff from NY
  • VisionPro IAQ Thermostat & Module

    Q:

    Will this thermostat control humidty (I need dehumdification only) as we live in FL and are gone during the summer? Presently I have one of your humidistats that does the job but I want to get a new ac system and replace my present stat and humidistat with one device. Will the dumidification feature work totally independent from the heat/cooling setting? Thanks
    Asked on 9/23/2010 by Denny from Pt St Lucie, FL

    1 answer

    • CUSTOMER CARE

      A:

      This will control dehumidifier units as well as humidifiers. Yes, the dehumidification feature works independently of the heat/cooling setting.

      Answered on 9/27/2010 by PexSupply Staff from NY
Displaying questions 1-8

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