Honeywell/Resideo TH4210U2002 is a programmable digital thermostat designed for 1-stage heat/1-stage cool conventional or 2-stage heat/1-stage cool heat pump systems (with aux heat). T4 Pro sports a large backlit display w/ adjustable idle brightness, choice of multiple programmability modes, keypad lockout and selectable automatic or manual changeover. This thermostat is a great mid-range model for those who want all the conveniences offered by a programmable thermostat but without the more complex indoor/outdoor sensor connection, internet access or app installation.
Features:
- Large, illuminated, easy to read display w/ adjustable idle brightness
- Multiple programmability modes: 5+2 / 5+1+1 or 7-Day, as well as non-programmable
- Pre-set program settings, can be temporary/permanently overridden
- Adaptive Intelligent Recovery (optional setting) is an improved version or Early Start - the system optimizes start time to reach desired temperature by programmed time settings
- Displays time, mode, ambient and setpoint temperature at the same time
- Keypad lockout
- Air filter change service reminders
- Fahrenheit (F) or Celsius (C) display mode
- Positive "Off" mode
- Low battery warning indicator
- 1°F temperature accuracy
- Built-in compressor protection
- Programmability: Programmable, 5-2 Day, 5-1-1 Day, 7-Day, Non-Programmable
- Stages: 1 Heat / 1 Cool Conventional or 2 Heat / 1 Cool Heat Pump w/ Electric Aux Heat (Gas/Oil/Electric Forced Air Heat / Heat Pump / Radiant Heat / Steam)
- Changeover: Auto or Manual
- Interface: Button
- Display: Monochrome
- Display Size: 3.93 sq in.
- Mounting: Square
- Color: White
- Electrical Ratings: 24V (20-30 Vac, 0.02-0.50A or 0.02-1.00A - varies by terminal)
- Power Method: Battery Only (2 x AA), Hardwired Only (terminals R & C) or Harwired with Battery Backup (terminals R + optional C)
- Terminal Designations: R, RC, C, W, O/B, Y, G, L, and K
- Dual Fuel: No
- Setting Temperature Range: Heat 40°F - 90°F / Cool 50°F - 99°F
- Ambient conditions: 37 to 102°F, 5 to 90% RH, non-condensing
- Dimensions (Height x Width x Depth): 4.1" x 4.1" x 1.1" (103.6mm x 103.6mm x 28mm)
- Packaged Weight: 14 oz
5-year warranty
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