Installing GLAS® is easy.

What’s in the box?

  • GLAS smart thermostat with anodized metallic finish
  • Quick start guide
  • Installation instructions
  • Paintable back plate
  • Screws and drywall anchors
  • C-wire adapter
  • Air seal
  • Wiring stickers

What’s behind GLAS?
So much more than a wall.

Get to know GLAS by watching these installation videos.
To download the installation instructions for GLAS, click here.

We take you through the whole process, from removing your old thermostat to the tools you need, to wiring info. GLAS looks beautiful on any wall, so we make it simple for you to get yours installed.

  • Getting Started
  • Removing your old thermostat
  • Installing the adapter
  • Attaching GLAS
  • Wiring GLAS

Technical features

The powerful capabilities of GLAS are a product of forward-thinking engineering and cutting-edge thermostat design. The sleek 5 in. H x 5.51 in. W x 1.18 in. D thermostat is the first of its kind to incorporate a translucent OLED touchscreen.

Download specs & requirements.


How are my energy savings calculated? How do I schedule a vacation? Get answers to your GLAS questions.

Browse FAQs


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