Smart glass is a glass with light transmission properties that are altered when voltage, light or heat is applied. These WiFi-connected glass surfaces are equipped with environmental sensors that can read room occupancy, weather, and sunlight. The downside is that this high-end technology doesn’t come very cheap.
Most smart window products cost at least 50 percent more. So if you’re installing several windows, it’ll add up quickly. On the other hand they can shave up to 20 percent of your energy costs off your monthly bills, so the return on investment might be worth it over time.