SimpleComfort® non-programmable heat only thermostat with backlit display, battery powered, vertical design (no fan output)


    Electrical Rating:
    - 24 VAC (18 to 30 VAC)
    - 1 amp maximum per terminal
    - 3 amp maximum total load
    Temperature Control Range: 45°F to 90°F
    Accuracy: (+/- 1°F)
    Terminations: R,W,S1,S2


  • Weight: 0.3
  • Height: 1.12
  • Width: 4.6
  • Length: 3.75

  • Non Programmable
  • Single-Stage, heat only (no fan output)
  • Elegant design
  • Vertical design for easy J-box installation
  • New ICM patented Thermal Intrusion Barrier
  • Manual Changeover
  • Simple operation
  • Large LCD display with backlight
  • Battery powered
  • Low battery indicator
  • Precise temperature sensing
  • Easy access terminal block
  • Compatible with gas, oil and hydronic systems
  • Millivolt compatible
  • Remote sensor compatible
  • Freeze protection feature

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Honeywell: T8775A1009, TH1100D1001 (battery only)
Robertshaw: 300-204
White-Rodgers: 1E78-140 Vertical, Mechanical 1F30-321, 1C20-102