Honeywell Home

Honeywell Home TH6100AF2004/U T6 Pro Hydronic Programmable Thermostat with Floor Sensor

SKU TH6100AF2004/U
Honeywell Home T6 Pro Hydronic thermostat for hot water and steam boiler systems. 7-day/5-2/5-1-1 or non-programmable. Controls via ambient air, floor sensor, or both. AQ12C20 wired floor sensor included. Adaptive Intelligent Recovery. 5-year warranty.
Technical documents available — View documents
Request Quote

Honeywell Home TH6100AF2004/U | T6 Pro Hydronic Programmable Thermostat

The Honeywell Home T6 Pro Hydronic (TH6100AF2004/U) is engineered specifically for hot water and steam boiler systems — including hydronic radiant floor heating. It can sense and control temperature based on ambient air, floor temperature, or both simultaneously, making it ideal for in-floor heating applications where floor protection is critical.

Three Intelligent Control Modes

  • Mode A (Ambient) — Senses room air temperature for standard comfort control
  • Mode F (Floor) — Controls based on floor temperature to prevent overheating of radiant floors
  • Mode AF (Combined) — Uses both sensors simultaneously for optimal comfort and floor protection

Flexible Scheduling

Choose from 7-day, 5-2-day, 5-1-1-day, or non-programmable operation to match any household routine. Adaptive Intelligent Recovery learns how long your boiler takes to reach target temperature and starts heating early — so the room is always at the right temperature when you need it.

Key Specifications

  • Dimensions: 4-1/16" L × 4-1/16" W × 1-3/32" D
  • Supply Voltage: 20–30 Vac
  • Stages: Up to 1 Heat (hot water and steam)
  • Set Temperature Range: 40°F–90°F (Heat)
  • Operating Range: 37°F–102°F (2.7°C–39°C)
  • Accuracy: ±1°F / ±0.5°C
  • UWP mounting system included
  • Floor sensor (AQ12C20) included
  • Remote indoor air sensor (C7189U1005) optional
  • 5-Year Warranty