The National Electrical Manufacturers Association (NEMA) published NEMA DC 3-2013
Residential Controls—Electrical Wall-Mounted Room Thermostats
NEMA DC 3 Annex A-2013
Energy-Efficiency Requirements for Programmable Thermostats.
NEMA DC 3 covers self-contained, electrical and electronic, wall-mounted room thermostats. This standard may be downloaded at no cost or purchased in hardcopy on the NEMA
website for $61.
NEMA DC 3 Annex A contains the performance requirements for programmable thermostats described as energy-efficient. This document may be downloaded at no cost or purchased in hardcopy format on the NEMA
website for $42.
National Electrical Manufacturers Association (NEMA) represents nearly
400 electrical, medical imaging, and radiation therapy manufacturers at
the forefront of electrical safety, reliability, resilience, efficiency,
and energy security. Our combined industries account for more than
400,000 American jobs and more than 7,000 facilities across the U.S.
Domestic production exceeds $117 billion per year.