ComfortLink® II XL850 Thermostat
What’s included in the price?
Pricing varies by location and dealer in addition to several other factors.
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Warranty & Registration
After getting a new system, be sure to protect it with a warranty.Protect your system
Learn more about your product, like its technical specs and innovative technology.Find your manual
Where do you go from here?
Research your needsConsider your home comfort level, climate, ductwork, energy use, and desired monthly heating and cooling costs.
Get a dealer quote
Schedule a visit with your dealer for a custom recommendation. Visit our Dealer Locator page for a list of questions to discuss with your dealer.