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White rectangular thermostat with digital display and push buttons

Honeywell

Honeywell TH4110U2005/U T4 Pro Thermostat

SKU CH-WSWZ-RV54K

Programmable or non-programmable thermostat with push-button control, filter-change and low-battery reminders, compatible with 1H/1C heat-pump and conventional systems

  • Programmable schedules for 7-day, 5-2 or 5-1-1 flexibility
  • Push-button programming simplifies daily temperature adjustments
  • Filter-change reminders help maintain system efficiency
  • Low-battery alerts prevent unexpected thermostat shutdowns
  • Optional upgrade path to Lyric T6 Pro Wi-Fi when ready

Honeywell T4 Pro programmable thermostat

The Honeywell TH4110U2005/U T4 Pro thermostat provides 7-day, 5-2, 5-1-1 or non-programmable scheduling for residential heating and cooling systems. Simple push-button controls make daily adjustments straightforward for homeowners and installers alike. Built-in filter change and low battery reminders help maintain system performance.

1H/1C heat pump and conventional compatibility

This thermostat supports single-stage heat pump systems with 1H/1C wiring as well as 1H/1C conventional gas, oil or electric configurations. The dual compatibility means the same unit suits two common equipment types without additional modules. Installers can standardise on one model for both applications.

Wired installation with Lyric upgrade path

The T4 Pro operates on standard thermostat wiring and requires a C-wire only when upgrading to the connected Lyric T6 Pro Wi-Fi model. Push-button programming works independently of any network connection. The design allows future Wi-Fi capability without rewiring the base.

Highlights

  • Programmable schedules for 7-day, 5-2 or 5-1-1 flexibility
  • Push-button programming simplifies daily temperature adjustments
  • Filter-change reminders help maintain system efficiency
  • Low-battery alerts prevent unexpected thermostat shutdowns
  • Optional upgrade path to Lyric T6 Pro Wi-Fi when ready

Specifications

BrandHoneywell

Questions about this item

How many heating and cooling stages does the 1H/1C rating on this thermostat actually support?

The 1H/1C rating means it controls one heating stage and one cooling stage, compatible with both single-stage heat pumps and conventional systems.

What wiring standard does the T4 Pro use and what does it require for a Wi-Fi upgrade?

It uses standard low-voltage thermostat wiring; upgrading to the Lyric T6 Pro Wi-Fi model requires a C-wire connection for power.

What mounting format does the TH4110U2005/U need on the wall?

It mounts directly to a standard wall surface or junction box using the included hardware, with no special bracket required.

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