Friedrich RT4 is a hardwired, digital, mercury-free, non-programmable, electronic thermostat compatible with single stage heating/cooling systems, and heat pump systems. Some notable features include:
Friedrich RT4 is a hardwired, digital, mercury-free, non-programmable, electronic thermostat compatible with single stage heating/cooling systems, and heat pump systems. Some notable features include:
Friedrich RT4 is a hardwired, digital, mercury-free, non-programmable, electronic thermostat compatible with single stage heating/cooling systems, and heat pump systems. Some notable features include:
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