Thermostat and Furnace Compatibility

Gas Furnace Systems - Low Voltage

Electronic Programmable Thermostat

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Type: Gas Furnace - Electronic Ignition
Number of Thermostat Wires: 2 or 3; with air conditioning 4 or 5
Voltage: 24 Volts AC
System Attributes: Intermittent pilot or hot surface ignition, forced air furnace

• Furnace and Thermostat Compatibility - Introduction
• Type of Systems - Millivoltage
• Type of Systems - Low Voltage
• Type of Systems - Line Voltage
• What to Look For When Identifying Your Furnace and Thermostat
• Gas Furnace System - Millivoltage
• Gas Furnace Systems - Low Voltage
• Boiler and Oil Fired Systems
• Electric Heat and Cooling Systems - Low or High Voltage
• Heat Pump Systems