Honeywell The Round - Heat Only

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Honeywell CT87K1004 Retail The Round - Heat Only Thermostat Mercury free thermostat with simple worry-free operation. Honeywell Classic Round design, world's most popular thermostat. Precise temperature control for heat only systems. Classic round styling. Decorative wall cover ring included, hides wall marks from previous thermostat. Compatible with heating only systems - forced air (gas, oil & electric), hot water & steam, heat pumps without backup. NOT compatible with electric baseboard heat (120-240V), heat pumps with backup or multi-stage heating/cooling.