Free residential service call with any repair during normal business hours

CSI Mechanical

   (704) 600-6267

Serving Shelby, NC Metro Since 2010

XL850 – TCONT850

  • Nexia™ Remote Climate Access included (Having more than 4 connected controls or adding accessories to your Nexia smart home system requires a monthly subscription for remote access via most web-enabled smartphones and computers.)
  • WiFi connectivity
  • Built-in Nexia Bridge
  • ComfortLink™ II communications
  • Compatible with 24V systems (BAY24VRPAC52DA required)
  • 5 heat/2 cool
  • 7-day programmable
  • 4.3″ color display
  • Interactive touchscreen
  • 2 filter change reminders
  • 5-day weather forecast
  • Dual fuel capable
  • Local radar and alerts
  • Allergy and quick clean cycles
  • Auto changeover
  • Maintenance reminders
  • Customizable Home Screen
  • Embedded diagnostics
  • Smart continuous fan


The ComfortLink™ II XL850 Zoning Control with built-in Nexia™ Z-Wave Bridge and Nexia™ Remote Climate Access combines zoning technology and a home automation hub to remotely control your home, comfort, and energy use. This control is 7-day programmable, with up to four schedules per day and five heat and two cool settings. In addition to a color display, it’s easily accessible from a smartphone, tablet or computer, which makes adjusting the temperature for your family’s comfort a breeze. Not only does the XL850 monitor indoor and outdoor temperatures, but it also tells you when it’s time to change a filter or schedule routine maintenance.