Tag: 1c26

EMERSON White Rodgers 1C20 Heating Only Thermostat YOUR THERMOSTAT REPLACES Description 1C20 1C26 Standard Heating & Cooling Systems – 4 or 5 wires No Yes Standard Heat Only Systems Yes Yes Millivolt Heat Only Systems – Floor or Wall Furnaces Yes Yes Standard Central Air Conditioning No Yes Gas or Oil Heat Yes Yes Electric…