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**Please note: This model is discountinued and has been replaced with the VisionPro 2000**
The Honeywell PRO4000 thermostat provides electronic control of 24 VAC single-stage heating and cooling systems, or 750 mV heating systems. System Types: Oil, gas or electric heat with air conditioning, hot water, warm air, high-efficiency furnaces, heat pumps, gravity, steam, Heat only, heat only with fan, or cool only.
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