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Glossary
Heat Pump heating/cooling system
Heat pumps are used to heat and cool a home. If your old thermostat has a setting for auxiliary or
emergency heat, you likely have a heat pump.
Conventional heating/cooling system
Non–heat pump type systems; these include air handlers, furnaces or boilers that run on natural
gas, oil or electricity. They may or may not include an air conditioner.
MAC ID, MAC CRC
Alphanumeric codes that uniquely identify your thermostat.
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