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about SageGlass

If you have a question that is not answered by our FAQs, check out our “Products” page to learn more about dynamic glass.

    • Is there a warranty on SageGlass products?

      We warranty the SageGlass IGU for up to 10 years depending on the building application; the electronics, electrochromic functionality and coatings carry a five-year warranty. For full details on our product warranties, email or call our Architecture Solutions group. 


    • Is SageGlass better suited to some types of buildings?

      SageGlass has been incorporated into a wide variety of commercial buildings and is a good fit for any project where controlling the sun is a challenge. Some of the leading types of projects where SageGlass has been used include commercial offices, schools and universities, healthcare facilities, cultural institutions, government facilities and skylights in a wide variety of buildings.

    • Is SageGlass available in more than one color?

      Yes – SageGlass is available in a variety of colors to complement your design or building. Please contact a SageGlass representative to discuss the best fit for your project. Learn more about the design possibilities of SageGlass. 

    • How is SageGlass manufactured?

      We use a vacuum deposition process called “sputtering” to coat conventional float glass with layers of metal oxides. This is the same process used to make low-e and double low-e glass. The coated SageGlass pane is then paired with one or two more pieces of glass (clear, tinted or laminated) and one or two spacers to make a double-pane or triple-pane insulating glass unit (IGU). Our state-of-the-art manufacturing facility is located in Faribault, Minnesota. Tours are available for prospective customers.

    • How fast does the tint level change?

      An average-sized pane of SageGlass transitions across 90% of its dynamic range (from clear to tinted or from tinted to clear) in 7-12 minutes. The switching speed depends on a number of factors, including the ambient temperature and glass size: The warmer it is outside, the faster the glass transitions. Larger panes take longer than smaller panes to fully transition. Also, keep in mind that in day-to-day use the glass often changes in smaller increments (e.g., from one intermediate state to the next lighter or darker state) rather than from fully clear to fully tinted, so the transition takes less time.

    • How does the cost of SageGlass compare with low-e insulated glass?

      Total cost of ownership for SageGlass is generally equivalent or lower because in most installations, we eliminate the need for shading systems and the many associated costs. SageGlass also helps you reduce your energy costs (meaning smaller HVAC systems running less often). So while we may cost more when you compare us on a glass-to-glass basis, you’re looking at apples versus oranges. The most important thing is the people factor. We don’t know how to quantify the many benefits of preserving the view and connection to the outdoors — which is the reason we put glass in buildings in the first place.

    • How does SageGlass technology work?

      We coat SageGlass panes with five layers of ceramic materials for a total thickness of less than 1/50th that of a human hair. When voltage is applied across the coatings, ions travel from one layer to another layer, prompting a reversible solid-state change that causes the coating to tint and absorb light. In other words, the glass gets darker. Reversing the polarity of the applied voltage causes the ions to migrate back to their original layer, untinting the glass. Still curious? To learn more, read about how dynamic glass works and switchable technology, or please contact a SageGlass representative to learn more.

    • How can I use SageGlass?

      SageGlass has been incorporated into a wide variety of commercial, institutional and even selected residential buildings—anywhere you’d like to bring in daylight, keep people comfortable, and give them an uninterrupted outdoor view and connection to the outdoors. Because it conserves energy, SageGlass is ideal for sustainable buildings. It also prevents fading, which protects interior spaces. Here are some particularly good matches for SageGlass: 

    • Has SageGlass technology been independently tested? How durable is it?

      SageGlass technology has undergone rigorous performance and durability testing by independent third parties, including the U.S. Department of Energy (DOE) and leaders in the glass fabricating and OEM skylight industry. SageGlass IGUs were the first products to pass the ASTM E-2141-06 (Standard Test Methods for Assessing the Durability of Absorptive Electrochromic Coatings on Sealed Insulating Glass Units). In fact, SageGlass technology survived over 100,000 cycles of accelerated environmental durability testing. That’s twice the test standard and equivalent to switching a window nine times per day for 365 days/year over a 30-year lifetime, according to the DOE’s National Renewable Energy Laboratory. Learn more about SageGlass' durability and reliability.

    • Do SageGlass products provide privacy?

      SageGlass is not privacy glass.  It provides some privacy since it transmits less than 1 percent of the visible light in its darkest state. SageGlass uses switchable technology so it can be tinted or cleared, easily. When the glass is fully tinted on a sunny day, it’s nearly impossible to see through the glass from the outside. But since SageGlass windows and skylights are intended to preserve outdoor views, they don’t provide 100 percent privacy in any state.  

    • Can you match SageGlass with other glass in my building?

      Whether dynamic or traditional, two pieces of glass from different sources rarely match exactly. When glass from multiple sources is installed in separate areas of a building, which happens a lot, slight mismatches are often undetectable. When there is no separation on the building between the two types of glass, you can order SageGlass in a color that complements the adjacent glass.

    • Can I “set it and forget it?”

      Yes, SageGlass can be tinted and cleared automatically, manually or integrated with a building automation system.  But you always have the ability to manually over-ride the automatic settings by a wall switch if so desired. Learn more about the control system.

    • Can I control SageGlass wirelessly?

      Yes, when you integrate it with a building automation system, SageGlass adopts that system’s remote control capabilities. In 2013, the CEO of SageGlass discussed this wireless technology more at the Greenbuild Conference.

    • Are there intermediate tint levels?

      Yes, with the SageGlass control system, you can select preset tint levels between the low and high ends of the glass’s dynamic range (1 percent – 60 percent). You can also program the SageGlass control system to maintain a constant light level inside the space throughout the day. In this case, sensors integrated with the framing will tell the glass how to respond to changing light conditions outside.

    • Are SageGlass products considered “low-emissivity”?

      Yes, the SageGlass coating has a low-e surface, so it provides all of the advantages of a spectrally selective low-e product (even in its clear, untinted state). Low-e coatings help keep heat in when it’s cold outside, and keep it out when it’s hot.

    • Does SageGlass require power?

      It takes less electricity to operate 2,000 square feet (186 square meters) of SageGlass than it does to power a single 60-watt light bulb. Learn how SageGlass Works

    • Do SageGlass windows and skylights help me get LEED credits?

      Yes, SageGlass can help your project earn LEED credits in several categories.

    • What is SageGlass?

      SageGlass is a leading electronically tintable glass for windows, skylights and curtain walls. It tints automatically or on demand to control sunlight, without shades or blinds, maintaining your connection to the outdoors and reducing energy consumption. The technical term is electrochromic glass or dynamic glass. 

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