Tag: Honeywell RTHL221
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Honeywell Home RTHL221 Programmable Thermostat Owners Manual
Honeywell RTHL221 Home Programmable Thermostat Identify System Type This thermostat is compatible with the following systems: Gas, oil or electric furnace Central air conditioner Hot water system with or without pump Millivolt system Central heating and cooling system Heat pump without auxiliary/backup heat Turn Off Power to Heating/Cooling System Remove Old Thermostat Remove old thermostat…