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Johnson Controls GLAS

Johnson Controls GLAS
alaScore 92

4 reviews

Mar, 2021

alaTest has collected and analyzed 4 reviews of Johnson Controls GLAS. The average rating for this product is 3.6/5, compared to an average rating of 4.4/5 for other products in the same category for all reviews. Reviewers are impressed by the size and reliability. The usability and design also get good feedback, whereas many are negative about the price.

design, usability, reliability, size


We analyzed user and expert ratings, product age and more factors. Compared to other products in the same category the Johnson Controls GLAS is awarded an overall alaScore™ of 92/100 = Excellent quality.

Review analysis

(Based on 4 reviews)

Expert Reviews  

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Showing 1 - 4 of 4 Show Reviews: in English

Expert review by : Dan Seifert (

The Cortana-powered GLAS thermostat isn’t as smart as it looks


The GLAS smart thermostat is missing some key features.

Stunning looks ; Large, easy-to-read display ; Support for Cortana, Alexa, and Google Assistant ; Indoor air quality measurement

High cost ; No remote sensor support ; Slow app and frustrating usability issues

Photography by Dan Seifert / The Verge

Aug, 2018

Expert review by : Megan Wollerton (

Johnson Controls GLAS review


Johnson Controls' GLAS Smart Thermostat costs $319. That's 70 bucks more than the Ecobee4 and Nest Learning Thermostat. Given that, the GLAS had better be pretty spectacular to compete. In some respects, it is. It's immediately clear you're paying...

Johnson Controls' GLAS Smart Thermostat has a built-in Cortana speaker and it also works with Alexa and Google Assistant. In addition to its basic capabilities, the GLAS provides indoor and outdoor air quality reports. Its unique, see-through OLED...

You're paying a premium ($319) for the OLED touchscreen and the integrated Cortana speaker.

The GLAS is a solid smart thermostat, but it isn't a good value if you don't feel strongly about its transparent display and Cortana functionality.

Aug, 2018

Expert review by : Jason D'Aprile (

Johnson Controls GLAS smart thermostat review: Hey Cortana, I’m cold!


No smart thermostat is more beautiful, but is that enough to justify a sky-high price tag?

Beautiful industrial design ; Fabulous user interface on an OLED touchscreen ; Monitors air quality and enlists your HVAC system to improve it

Cortana isn't the strongest digital assistant for the smart home ; You'll have to wait for remote room sensor support ; Much more expensive than the competition

The GLAS’s OLED touchscreen, its fabulous user interface, and its air-quality monitoring feature is fantastic. The benefit of embedding a Cortana smart speaker in this smart thermostat isn’t as clear, but Johnson Controls covered its bases by...

Sep, 2018

Expert review by : David Wise Austin Palmer change comparison (

Johnson Controls GLAS Review


Finishing close to the top of the group, the GLAS is a solid thermostat, but couldn't quite topple our top recommendations. It has a particularly sleek and...

We were very excited about the prospects of this thermostat and ended up coming away disappointed. This device did quite well overall, but its excessively premium price doesn't quite mess with its second or third tier performance, precluding us from...

Oct, 2018

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