Honeywell Home TH1110D2009/U T1 Pro Non-Programmable Thermostat

Item #: HONE-TH1110D2009/U
Mfr. part #: TH1110D2009/U
UPC: 085267344920

Key specifications

System typeConv. or heat pump
Stages1H/1C
PowerBattery or hardwired
ProgrammableNo
DisplaySmall, backlit

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$49.04

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Shipping details

Shipping weight: 0.75 lb
Box size: 6.25 × 5.15 × 2.4 in

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Brand	Honeywell Home
Manufacturer part #	TH1110D2009/U
Supply Voltage	20 to 30 Vac
Frequency	50 Hz; 60 Hz
Electrical Connections	Honeywell UWP Mounting System
Electrical Ratings	20 to 30 Vac
Operating Temperature	32 F to 102 F
Ambient Temperature	32 F to 120 F
Operating Humidity	5 to 90% RH, non-condensing
Mounting	UWP Mounting System
Application	24 Vac systems; Gas, Oil, Electric Warm Air; Hot water Coil; Gas, Oil, Electric Hydronic; or Steam / Gravity Systems
Includes	Thermostat, UWP mounting system, Installation (J-box) adaptor,
Dimensions	4-1/16 in. long x 4-1/16 in. wide x 1-3/32 in. deep
Stages	Up to 1 Heat/1 Cool Heat Pumps; Up to 1 Heat/1 Cool Conventional Systems
Switch Positions (System)	HEAT-OFF-COOL
Switch Positions (Fan)	AUTO-ON
Shipping and Storage Temperature Range (F)	- 20 F to 120 F
LEDs	LED Back Light
Power Method	Battery or Hardwired
Color	White
Display	Small display, Soft Key Controls
Accuracy (F)	1F
Differential Temperature (F)	± 1 F
Switch Type	Relay
Programmability	Non-programmable
Display Size	2.37 sq. in.
Temperature Control Mode Selections	Ambient Air Temperature
Changeover	Manual
Setting Temperature Range (F)	Heat: 32 F to 90 F; Cool 50 F to 99F
Cool Current	0.02 A to 1.0 A running
Heat Current	0.02-1.0 A
Fan Current	0.02-.05 A
UPC	085267344920

TH1110D2009 has been discontinued by the manufacturer (2026-05). Suggested replacement: TH2110U4004 - FocusPro P200 Programmable, 1H/1C, Large Display Thermostat.

The Honeywell Home TH1110D2009/U is a T1 Pro wall thermostat.

Non-programmable. One setpoint, changed by hand. That is the right choice for a rental, a shop, a space on a fixed occupancy, or any job where a schedule would just get overridden. Fewer things to explain at handover, and nothing to reprogram after a power event.

Where it sits in the range. Resideo builds these in tiers, and the tier number is the amount of control you get, not the build quality. T1 and PRO 1000 are single-stage and non-programmable — set it and leave it. T3 and PRO 3000 add a digital display and more staging. T4 and PRO 2000 add scheduling. T6 covers multi-stage and heat pump work, with a Smart version that adds Wi-Fi. T10 Pro is the top of the line, with RedLINK and remote room sensing. PRO 1000, PRO 2000 and PRO 3000 are the older names for the same tiers as T1, T4 and T3 — if you are matching what came out of the wall, the PRO number and the T number can be the same generation of product under two labels.

Before you order. Match the thermostat to the equipment, not to the room: count the heating and cooling stages the system actually has, and confirm whether it is a heat pump or a conventional system, because the two wire differently at the thermostat. A unit rated for more stages than you have will work; one rated for fewer will not run the equipment you own. If you are replacing a Honeywell Home unit, the part number carries over — Honeywell Home thermostats are made by Resideo, and the legacy numbering is the same.