ComfortLink® II XL850 Thermostat
What's included in the price?
Pricing varies by location and dealer in addition to several other factors.
Technical Specs
Additional features of the ComfortLink® II XL850 Thermostat
As a Smart thermostat, ComfortLink II XL850 delivers an intuitive, colorful, user interface that you can easily control from phone, tablet, or laptop so that you can achieve ideal home comfort or energy savings from virtually anywhere. The XL850’s accompanying Z-wave® devices enables you to access over 200 devices in your home for easy monitoring, so homeowners can keep tabs on their home 24-7 and get real-time data and diagnostics help if there’s ever a problem. No matter the season, you can tap into the comfort you deserve with Trane’s popular ComfortLink® II XL850 thermostat.
Learn more about smart thermostats
- What Is a Smart Thermostat?
- 14 Smart Thermostat FAQs: Everything You Need to Know
- What Is a Smart HVAC System?
- How Do Smart Thermostats Save You Money?
- Smart Thermostats + the Trane® Home App = Connected Comfort
- Trane’s Best Smart Thermostats
- How Trane Smart Thermostats Protect Your Privacy & Security
- Average Cost to Install a Thermostat
- Behind the Scenes of Trane Diagnostics: The Technician App
- Homeowner’s Guide to Trane Diagnostics
ComfortLink™ II XL850 Smart Thermostat FAQs
The XL850 smart thermostat is compatible with Trane variable speed communicating systems. It is not compatible with other HVAC brands or standard single-stage, two-stage, or multi-speed systems.
No. Only the Trane Link Zone Thermostat, the Trane Link UX360 smart thermostat, and the ComfortLink™ II XL1050 smart thermostat are compatible with a Trane zoned HVAC system. They’re paired with a specific HVAC zone controller and HVAC sensors.
The IDS is a humidity-control system that pairs a compatible Trane smart thermostat with a variable speed Trane AC unit, heat pump, and air handler/furnace. Sensors monitor your home’s humidity and signal the AC unit, heat pump, or whole-home dehumidifier to pull moisture out of your home without over-cooling, keeping indoor humidity at a comfortable level and improving indoor air quality (IAQ).
Yes. In addition to being able to control this smart thermostat manually and with the Trane Home App, you can also integrate it with your voice assistant to optimize your comfort without getting off the couch or leaving your guests.
The XL850 smart thermostat comes with a built-in Z-Wave bridge. This makes it possible to integrate many other smart home devices, including the Awair Element Indoor Air Quality Monitor, certain lighting systems, some security systems, and more. Visit Trane Home for a complete list of certified and compatible products.
The registered limited warranty for functional parts on the XL850 is 10 years. This far exceeds other big-name smart thermostats, which have 1-5-year warranties.
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Warranty & Registration
After getting a new system, be sure to protect it with a warranty.
Owner’s Manuals
Learn more about your product, like its technical specs and innovative technology.
Where do you go from here?
Research your needs
Consider 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.
