Honeywell TH4110U2005/U T4 Pro...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$186.87
$87.21
Honeywell TH4110U2005/U T4 Pro Programmable Thermostat, 1 Heat/1 Cool, compatible with Heat Pump and Conventional Systems – front view showing LCD display with temperature, fan, and mode controls

Honeywell TH4110U2005/U T4 Pro Programmable Thermostat, 1H/1C Heat Pump & Conventional

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Model: TH4110U2005/U
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$186.87
$87.21
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Honeywell T4 Pro Programmable Thermostat (TH4110U2005/U)

The Honeywell T4 Pro is a reliable, easy-to-install programmable thermostat designed for residential and light commercial HVAC applications. Compatible with 1 Heat/1 Cool heat pump systems and 1 Heat/1 Cool conventional systems, it supports multiple programming schedules and mounts using the standard UWP system shared across all Honeywell T Series thermostats — making retrofits and replacements straightforward for HVAC contractors and property managers alike.

Key Features

  • Supports up to 1 Heat/1 Cool heat pump and 1 Heat/1 Cool conventional systems
  • Flexible scheduling: 7-day, 5-2, 5-1-1, or non-programmable modes
  • Simple push-button functionality — minimal training required for tenants or end users
  • Filter change reminders help maintain system efficiency
  • LED backlit medium display with soft-key controls
  • UWP Mounting System — standard across all T Series thermostats for fast, consistent installation
  • Battery or hardwired power options
  • 5-year warranty
  • Easy upgrade path to Honeywell Lyric T6 Pro Wi-Fi when C-wire is available

Specifications

  • Voltage: 20–30 Vac, 50/60 Hz
  • Operating temperature: 37°F–102°F (2.7°C–39°C)
  • Setting range: Heat 40°F–90°F; Cool 50°F–99°F
  • Accuracy: ±0.5°C / ±1°F
  • Humidity: 5–90% RH, non-condensing
  • Dimensions: 4-1/16 in. L × 4-1/16 in. W × 1-3/32 in. D
  • Color: White

What's Included

  • Thermostat
  • UWP mounting system
  • Installation (J-box) adaptor

Download TH4110U2005/U Spec Sheet (PDF)

Manufacturer Resources

Product Specs

Department:
Safety
Accuracy C :
0.5 C
Ambient Temperature Range C :
0 C to 50 C
Ambient Temperature Range F :
32 F to 120 F
Application:
Standard Efficient Gas Forced Air, High Efficacy Gas Forced Air, Oil Forced Air, Electric Forced Air, Hot water Fan Coil, Geothermal Heat Pump, Air to Air Heat
Changeover:
Auto or Manual
Cool Current:
0.02 A to 1.0 A running
Differential Temperature C :
± 0.5 C
Differential Temperature F :
± 1 F
Dimensions In :
4-1/16 in. long x 4-1/16 in. wide x 1-3/32 in. deep
Dimensions Mm :
103.6 mm long x 103.6 mm wide x 28 mm deep
Display:
Medium display, Soft Key Controls
Display Size:
3.93 sq.in.
Electrical Connections:
Honeywell UWP Mounting System
Electrical Ratings:
20 to 30 Vac
Fan Current:
0.02-.05 A
Frequency:
50 Hz; 60 Hz
Heat Current:
0.02-1.0 A
Includes:
Thermostat, UWP mounting system, Installation (J-box) adaptor
Item Type:
Product
Leds:
LED Back Light
Mounting Method:
UWP Mounting System
Operating Humidity Range Rh :
5 to 90% RH, non-condensing
Operating Temperature Range C :
2.7 C to 39 C
Operating Temperature Range F :
37 F to 102 F
Power Method:
Battery or Hardwired
Product Color:
White
Programmability:
7 day, 5-1-1 day, 5-2 day, or Non-programmable
Setting Temperature Range C :
Heat: 4.5 C to 32.0 C; Cool: 10 C to 37.0 C
Setting Temperature Range F :
Heat: 40 F to 90 F; Cool 50 F to 99F
Shipping And Storage Temperature Range C :
-28.9 C to 48.9 C
Shipping And Storage Temperature Range F :
20 F to 120 F
Stages:
Up to 1 Heat/1 Cool Heat Pumps; Up to 1 Heat/1 Cool Conventional Systems
Supply Voltage:
20 to 30 Vac
Switch Classification:
Relay
Switch Positions Fan :
AUTO-ON
Switch Positions System :
HEAT-OFF-COOL-AUTO.
Temperature Control Mode Selections:
Ambient Air Temperature

Honeywell TH4110U2005/U – Frequently Asked Questions

1) Will the Honeywell T4 Pro TH4110U2005/U work on a heat pump, or is it conventional only?
Both. The T4 Pro TH4110U2005/U handles up to 1 Heat/1 Cool heat pumps and up to 1 Heat/1 Cool conventional systems, so it covers gas, oil and electric forced air, hot water fan coil, geothermal heat pump and air-to-air heat pump applications. What it will not do is a multi-stage system. If the equipment has a second stage of heat or cool, or a heat pump with auxiliary/emergency heat, this is the wrong stat and you need a multi-stage model.
2) Do I need a C-wire for the Honeywell T4 Pro thermostat?
No. The T4 Pro runs on batteries or hardwired 20 to 30 Vac power, so it installs on older openings with no common wire pulled. Keep in mind the tradeoff: if you do have a C-wire and want Wi-Fi, the same UWP subbase takes the Lyric T6 Pro, so you can move up later without rewiring.
3) Will the Honeywell T4 Pro cover the holes left by the old thermostat I'm removing?
The T4 Pro measures 4-1/16 x 4-1/16 x 1-3/32 inches (103.6 x 103.6 x 28 mm), which is a small square footprint. It mounts on the Honeywell UWP subbase, and a J-box adaptor comes in the box for openings cut to an electrical box. On a retrofit where the previous stat was a wide horizontal unit, expect to patch and paint, or add a cover plate, because those numbers will not hide a larger cutout.
4) If I'm standardizing thermostats across a building, will the T4 Pro mount on the same base as the other Honeywell T Series stats?
It will. The TH4110U2005/U uses the Honeywell UWP Mounting System, which is shared across the T Series line. Practically, that means one subbase and one wiring approach for the whole property, and swapping a unit later (including up to a Wi-Fi T6 Pro where a C-wire exists) does not mean re-drilling the wall.
5) What comes in the box with the TH4110U2005/U, and do I need to order a wall plate separately?
Three pieces ship together: the thermostat itself, the UWP mounting system, and the installation (J-box) adaptor. The subbase is not a separate order. What is not included is batteries, and any decorative cover plate if you are hiding a larger old cutout.
6) Can I set the Honeywell T4 Pro to run non-programmable for a tenant?
Yes, and that is a common move in rentals. The T4 Pro configures as 7-day, 5-1-1 day, 5-2 day, or fully non-programmable, so you can lock it to a simple set-and-hold for tenants and use full 7-day scheduling in an office or a vacant unit. Controls are soft keys on a medium LED backlit display, so there is very little to explain to an occupant.
7) How low and how high will the Honeywell T4 Pro let me set the temperature?
Heat sets from 40 F to 90 F and cool from 50 F to 99 F (4.5 to 32.0 C heat, 10 to 37.0 C cool). The 40 F bottom end matters for anyone running freeze protection in a vacant unit or a seasonal property, it will hold a low setback without letting pipes go. Control accuracy is 0.5 C with a differential of plus or minus 1 F.
8) Can I mount the T4 Pro in an unconditioned space like a garage, warehouse or storage building?
Within limits. The T4 Pro operates from 37 F to 102 F (2.7 C to 39 C) and tolerates 5 to 90% RH non-condensing. That rules out a space that drops below freezing or a damp area where condensation forms on the cover. For storage and shipping before install, the range is wider at 20 F to 120 F.
9) What transformer and load ratings does the TH4110U2005/U need on a light commercial job?
It is a 20 to 30 Vac low-voltage control at 50 or 60 Hz, switching through relays. Load draw is 0.02 to 1.0 A running on both heat and cool, and 0.02 to 0.05 A on the fan. Standard 24 V control transformer territory, so it drops onto typical residential and light commercial forced-air equipment without an interposing relay.
10) Does the Honeywell T4 Pro have an auto changeover between heating and cooling?
Yes, changeover is selectable auto or manual, and the system switch reads HEAT-OFF-COOL-AUTO. Set it to auto in a shoulder-season climate and the stat picks heat or cool itself; set it manual where you want an occupant locked to one mode. Fan positions are AUTO and ON.
11) Does the Honeywell T4 Pro remind you to change the filter?
It does. Filter change reminders are built in, which is the reason a lot of property managers pick this one over a bare non-programmable stat: the tenant gets prompted instead of the filter running a year past due and the coil paying for it. The reminder is on the medium backlit display alongside the soft keys.
12) What color is the Honeywell T4 Pro and how big is the screen?
White, with a 3.93 square inch backlit display. The overall body is 4-1/16 inches square and just 1-3/32 inches deep, so it sits close to the wall in a corridor or a leasing office where a bulky stat gets knocked.
How fast can I get the Honeywell TH4110U2005/U delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Honeywell TH4110U2005/U come with a warranty?
Absolutely. The Honeywell TH4110U2005/U is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Honeywell TH4110U2005/U?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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