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Honeywell/Resideo TH6100AF2004 is a programmable digital thermostat designed for hydronic (hot water) radiant floor heating applications (comes with a floor sensor). This thermostat has a large backilt display, offers selection of operating modes (including freeze protection) and a wide range of programmability options, as well as many other useful 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
  • Multiple operation modes - A (ambient only), F (floor only) and AF (ambient & floor temperature)
  • Vacation and Eco modes
  • Freeze protection mode
  • Displays time, mode, ambient (or floor) and setpoint temperature at the same time
  • Positive "Off" mode
  • Fahrenheit (F) or Celsius (C) display mode
  • Keypad lockout
  • Low battery warning indicator
  • 1°F temperature accuracy

Technical Specifications:
  • Programmability: Programmable, 5-2 Day, 5-1-1 Day, 7-Day, Non-Programmable
  • Stages: Heat Only
  • Changeover: n/a
  • Interface: Button
  • Display: Monochrome
  • Display Size: 5.44 sq in.
  • Mounting: Square
  • Color: White
  • Electrical Ratings: 24V (18-30 Vac, 0.02-1.00A)
  • 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, S, and S
  • Dual Fuel: No
  • Setting Temperature Range: 40°F - 90°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: 16 oz

5-year warranty
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