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Learning Thermostat 3rd Gen - why does it say "Preheating"? System is a gas-fired boiler with hot water radiators. "Heating" would make sense; "Preheating" makes no sense at all. : r/Nest
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Google Nest Learning Thermostat 2nd Gen. Programable Smart Thermostat Automatiacally Adjusts and Helps Save Energy - Walmart.com
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