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Thermostats & HVAC Controls

Wall thermostats for heating and cooling systems, plus the accessories that go with them: C-wire adapters, lockable guards and wall plates.

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Wall thermostats for heating and cooling systems, plus the accessories that go with them: C-wire adapters, lockable guards and wall plates.

How to check compatibility

  • System type. Single-stage systems (1 heat / 1 cool) work with nearly any low-voltage thermostat. Heat pumps and multi-stage systems need a model that lists them.
  • Voltage. Most central systems are 24 V. Electric baseboard heaters use line-voltage (120/240 V) thermostats, which are a different product.
  • C-wire. Smart and many backlit thermostats need a common wire for constant power. If your wall bundle has no spare conductor, a C-wire adapter supplies it.
  • Guards list the largest thermostat they cover; measure height and width.

Wiring questions should go to a licensed HVAC technician. Related: air filters and smart home.