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Honeywell VisionPro IAQ Programmable Universal Thermostat with Total Home Comfort Control image
 
(based on 7 ratings)
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Brand: Honeywell
Located in: 1 Heat/1 Cool
Honeywell VisionPro IAQ Programmable MultiStage Thermostat with Total Home Comfort (YTH9421C1002) • 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 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.
More information for the Honeywell VisionPro IAQ Programmable Universal Thermostat with Total Home Comfort Control
Review Snapshot®
Avg. Customer Rating:
 
4.9 stars
(based on 7 reviews)
100% of respondents would recommend this to a friend.

Customers most agreed on the following attributes:

Pros:
Easy to adjust(6), Easy to install(7), Intuitive controls(6), Precise controls(4)
Best Uses:
Home(6)
Describe Yourself:
Homeowner(7)
 
Great product
By EngineerVerified Purchaser from Colorado on 1/25/2010
Pros:
Easy To Adjust, Easy To Install, Intuitive Controls, Precise Controls
Best Uses:
Central Controls, Homes
Describe Yourself:
Homeowner
Bottom Line:
Yes, I would recommend this to a friend

Comments about Honeywell Honeywell VisionPro IAQ Programmable Universal Thermostat with Total Home Comfort Control:

Product works very well! Installation was easy, but consult a professional. I especially like the outdoor temp display with the extra sensor I installed. Works great with our humidifier. The frost protection keeps frost from building on the windows during cold winter temps. Instructions and product literature are very complete.

 
best on the market
By markVerified Purchaser from ohio on 2/14/2009
Pros:
Easy To Install, Intuitive Controls
Best Uses:
Homes
Describe Yourself:
Homeowner
Bottom Line:
Yes, I would recommend this to a friend

Comments about Honeywell Honeywell VisionPro IAQ Programmable Universal Thermostat with Total Home Comfort Control:

easy enough for a home owner to install and set-up.

 
Easy install, user friendly
By FixerupperVerified Purchaser from Chicagoland on 12/27/2008
Pros:
Easy To Adjust, Easy To Install, Intuitive Controls, Precise Controls
Best Uses:
Homes
Describe Yourself:
Homeowner
Bottom Line:
Yes, I would recommend this to a friend

Comments about Honeywell Honeywell VisionPro IAQ Programmable Universal Thermostat with Total Home Comfort Control:

I went with this unit when I installed my new furnace. The "auto discover" recognized my 2 stage furnace and humidifier, so all I had to program was my settings. Install was a snap, we hardly needed the instructions.

 
Love it.
By Ed the DIYerVerified Purchaser from Leonardtown, MD on 12/1/2008
Pros:
Easy To Adjust, Easy To Install, Intuitive Controls, Precise Controls
Describe Yourself:
Homeowner
Bottom Line:
Yes, I would recommend this to a friend

Comments about Honeywell Honeywell VisionPro IAQ Programmable Universal Thermostat with Total Home Comfort Control:

Installation was a breeze, just don't miss that the diagram does show the common ground being connected (C to C), like I did. I'm a total amateur and installed this thing with no problem. I hooked up the outside thermometer and the Honeywell TrueSteam Humidifier (HM509H8908) with no problem. You can buy the manual control humidifier because this thermostat does the controlling. I plan to add the ventilator at some point too.

[7 of 7 customers found this review helpful]

 
Excellent features & smart modular appro
By DriftwoodVerified Purchaser from Brookfield, IL on 4/19/2008
Pros:
Easy To Adjust, Easy To Install, Intuitive Controls
Best Uses:
Homes
Describe Yourself:
Handyman, Homeowner
Bottom Line:
Yes, I would recommend this to a friend

Comments about Honeywell Honeywell VisionPro IAQ Programmable Universal Thermostat with Total Home Comfort Control:

I used this model to replace an older thermostat and a separate humidistat. As an engineer, I like the basic idea of separating the output contact module from the control display, and installing the outputs close to the furnace. I really like that the optional outdoor sensor is used to automatically adjust the humidity level in the winter. It's also very useful in the mornings for quickly seeing the outside air temp. The display also serves as a handy night light. Very easy to install and program. I also like the resetable reminders for filter, humidifier pad, and UV light replacement. It also automatically circulates air in the house, independent of heat or cooling requirements. But I highly recommend the outdoor sensor option to take full advantage of its humidity controls.

 
Great Product
By JimVerified Purchaser from Lyford, Texas on 4/15/2008
Pros:
Easy To Adjust, Easy To Install, Intuitive Controls, Precise Controls
Best Uses:
Central Controls, Homes, Large Rooms, Offices, Small Rooms
Describe Yourself:
Handyman, Homeowner, Professional
Bottom Line:
Yes, I would recommend this to a friend

Comments about Honeywell Honeywell VisionPro IAQ Programmable Universal Thermostat with Total Home Comfort Control:

Fantastic climate control with immediate monthly electric bill cost reduction.

 
Great thermostat
By wxlidarVerified Purchaser from State College, PA on 4/11/2008
Pros:
Easy To Adjust, Easy To Install, Precise Controls
Best Uses:
Homes
Describe Yourself:
Homeowner
Bottom Line:
Yes, I would recommend this to a friend

Comments about Honeywell Honeywell VisionPro IAQ Programmable Universal Thermostat with Total Home Comfort Control:

Unit was easy to install and setup. There are quite a few settings built into the unit but manual made it simple. I use the thermostat to control our A/C, humidifier, fan (no heat). My only wish is for the cycle time for air circulation (to filter the air) was adjustable. It is fixed at a 35% duty cycle.

Customer Reviews about the Honeywell VisionPro IAQ Programmable Universal Thermostat with Total Home Comfort Control at iaqsource.com
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