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Residential & Commercial Controls

Residential and commercial controls are automatic devices that are mechanically, electro-mechanically, electrically, or electronically actuated to respond to temperature, pressure, humidity, light, electrostatic effect, flow, or liquid level.

Components that enable these uses include:

  • Automatic household controls
  • Class 2 and 3 transformers designed primarily for use with residential controls
  • Control transformers
  • Inherent overload protective devices for fractional horsepower split phase and capacitor motors
  • Motor-driven and other types of programming sequencing devices
  • Panels for air-conditioning, refrigeration, and electric heating
  • Relays that control the starting windings of fractional horsepower split phase and capacitor motors

NEMA Members manage the NEMA Energy Aware certification and labeling program for residential high-performance programmable thermostats.



  • Develops and maintains technical Standards for residential and commercial controls
  • Provides input to Underwriters Laboratories (UL) safety Standards as well as other codes, Standards, regulations, and legislation


  • Develops and advocates for industry positions to government in support of thermostat products (e.g., U.S. Department of Energy programs, California Energy Commission, thermostat recycling efforts, and tariffs)


  • Building automation
  • Clothes washing, drying, and ironing
  • Lighting
  • Programmable thermostats
  • Refrigeration
  • Residential appliances


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