Serving Pinellas, Western Hillsborough & Southwest Pasco

Trane ComfortLink® II XL 850
Smart Thermostat


Cooling Stages                              2

Heating Stages                             5

Smart                                        Yes

Z-Wave                                      Yes

Comm/Variable Compatible      Yes

Touchscreen Size       4.3″ full color

Diagnostics                               Yes

Programmable                          Yes

Category: Thermostats


Smart connectivity and control

This exceptional thermostat combines a colorful touchscreen with a smart home hub, accessible via smartphone, tablet, or laptop, for the ultimate smart comfort experience. With the XL850’s built-in bridge for Z-wave® devices, you have the ability to monitor and control over 200 devices in your home, from virtually anywhere.

Real time diagnostics

The ComfortLink® II XL850 comes equipped with Trane Diagnostics. When you opt-in to remote diagnostics, your dealer can access real time data about how your HVAC system is performing, and will be alerted if there’s a problem. Plus, if you grant your dealer remote access, they can even tap into your system and help troubleshoot problems remotely.

Impressive features

The ComfortLink ® II XL850 boasts impressive features for homeowners to enjoy such as WiFi or ethernet connectivity, a color touchscreen, built-in bridge for Z-Wave ® devices and programming for 7 days a week.

Exceptional comfort

The ComfortLink® II XL850 works with a network of controls and sensors to optimize your temperature and humidity levels. Real-time adjustments, scheduling, and remote controls ensure your changing temperature needs will be fulfilled.


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.


The ComfortLink® II XL1050 boasts impressive features for homeowners to enjoy such as:

  • 7-day Programmable
  • 5 heat/ 2 Cool
  • Zoning Capability: No
  • Screen size: 4.3”


  • 10 Yr limited
  • If the product is not registered within 60 days of installation, Trane’s Base Limited Warranty terms will apply.
  • Call to learn more…

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