Electrochromic glass is the largest smart glass market today and won't be obsolete any time soon. For those unfamiliar with the technology, the more common form of electrochromic glass transitions from clear or pale yellow to a bright dark blue (this is due to the discoloration of the tungsten oxide electrochromic layer), and the color changes from The edges gradually change inwards. It blocks light and heat, functionally replacing blinds and even air conditioners, but electrochromic glass is also relatively expensive. IDtechEx predicts that, depending on the size of the project, the upfront price will be $400 to $800 per square meter, while Low-E float glass (coated with a special energy-saving layer) will cost as little as $300 per square meter. The reason for the price difference is that electrochromic glass will require a more energy-intensive vacuum deposition process during the production process (which will bring high electricity bills) and this is why we don't want our friends to make their own this summer. Show off the use of this glass at barbecues.

But another reason people don't use this glass in their homes is its color: it's blue. While market leaders believe the color has health benefits (it simulates daylight, which may improve mental health and productivity), that claim feels like an afterthought. In fact, new entrants to the field may be certain of this: Kinestral Technologies, a new company backed by Asahi Glass, has launched a more neutral grey smart glass that matches the colour of buildings and is already being used in Facades of certain buildings. Grey electrochromic glass may also be an important advantage to differentiate other players (blue electrochromic glass) in this market.

Although electrochromic glass still has some shortcomings, the market has clearly begun to flourish, and the continuous expansion of its project scale also confirms this trend. For example, a few years ago, US electrochromic glass supplier VIEW had one of the larger projects in the size of around 2,500 square meters (a healthcare facility in Toronto, Canada), but in 2018 the company is installing for America Center II in San Jose About 9200 square meters of electrochromic glass. Customers are gradually becoming more aware of the advantages of this technology and are more willing to bear the extra cost of using electrochromic glass.