Most thermostats sold today don’t contain mercury. Programmable electronic thermostats and many manual thermostats are now mercury-free. Honeywell makes a round thermostat that doesn’t contain a mercury switch that looks exactly like the older mercury-containing thermostat.
Two types of thermostats typically do not contain mercury switches:
For new thermostats, check on the package. Thermostats with mercury will have the “Hg” sign for mercury on the packaging.
For thermostats in use, take off the cover and look inside. If there is a glass ampoule (or ampoules) containing a silvery substance, the thermostat contains mercury.
Mercury-free thermostats are just as reliable and easy-to-use as those that contain mercury—and they conserve energy. These thermostats are widely available.
For more information contact Taylor Watson, Health and Environmental Investigator, at firstname.lastname@example.org.