Heating: Gas furnace, either natural gas (NG) or propane (LP), oil furnace, heat pump with or without auxiliary heat strips.Most are used for supplemental heat or space heating.įeel free to jump to the section that covers your specific topic:Ģ4V or low-voltage heating and cooling systems include one or more of these components: Millivolt power: These are gas-fired heaters that don’t use electricity because they don’t have a blower fan.110V or 240V power: These are called high-voltage or line-voltage systems and include electric furnaces and electric baseboard systems.Note that only 24-volt wiring is covered: We do not cover 110/240-volt thermostat wiring and millivolt thermostat wiring issues.Īs the Pick HVAC Thermostat Buying Guide says about these thermostats of alternate voltage: No matter if your thermostats are from third-party brands like Honeywell, Nest, Sensi, White Rodgers or Ecobee, or the same brands (Trane, Carrier, Goodman, etc.) as your HVAC systems, this guide will help familiarize you with the wiring process.
This complete 24-volt thermostat wiring guide covers all thermostat wiring issues from the simple to the complex – from basic 2 wire thermostat wiring common to gas furnaces all the way to 8 wire thermostat wiring for two stage heat pumps and similar HVAC systems.
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