SUSTAINABLE GLASS FACADES AND ENERGY-SAVING WINDOWS
SageGlass is a sustainable glass product that allows architects and builders to elegantly solve solar-control challenges without sacrificing aesthetics, design or energy-efficiency.
A building even partially glazed with SageGlass can be designed to take advantage of natural daylight without compromising the connection to the outdoors, making SageGlass a great fit for projects aiming to achieve sustainability certifications. By blocking sunlight on hot days and harnessing the sun’s energy on cold days, SageGlass dramatically reduces energy demand and the need for HVAC, while increasing occupant comfort and wellbeing.
PROVEN ENERGY BENEFITS
Buildings and construction together account for 36 percent of global final energy use and 39 percent of energy-related carbon dioxide (CO2) emissions when upstream power generation is included, according to UN Environment and the International Energy Agency in their Global Status Report 2017.
Due to the ability of SageGlass to adapt to solar heat and light depending on the seasons and needs, it brings a level of efficiency to a project that adds up to significant long-term savings over the course of a building’s life cycle.
In addition to reducing the up-front material costs of shading systems, SageGlass can also help reduce building operating costs. It reduces overall energy loads by an average of 20 percent and peak energy demand by up to 26 percent over a building’s life cycle1.
How SageGlass Works
SageGlass’ electrochromic coating consists of five layers of ceramic material. Applying a low voltage of electricity darkens the coating as lithium ions and electrons transfer from one electrochromic layer to another electrochromic layer.
Reversing the voltage polarity causes the ions and electrons to return to their original layer, causing the glass to return to its clear state.
This solid-state reaction is controlled through a very low voltage (less than 5V DC) power supply. A darkened state enables SageGlass to absorb and reradiate away the sun’s unwanted heat and glare. A clear state allows you to maximize daylight and solar energy.
GREEN CERTIFICATIONS & MATERIAL TRANSPARENCY
In an age when environmental responsibility is expected, SageGlass can help you earn a wide range of credits towards green building certifications, such as LEED, BREEAM, WELL, LBC, Estidama, HQE and more.
SageGlass has a third-party verified Environmental Product Declaration (EPD) to provide architects, owners and specifiers with transparency documentation on the life-cycle environmental impact of the product. Material transparency is vital for reaching new sustainability requirements, and this EPD will make it even easier.
The EPD also helps SageGlass evaluate its own environmental impact. Along with Saint-Gobain, we use Life Cycle Assessments (LCAs) as a critical part of our eco-innovation process to identify impact-reduction opportunities at every stage of the lifecycle and quantify those reductions for improved and second-generation products.
Learn about our company’s Sustainable Manufacturing Commitment.
STATIC GLASS VS. ELECTROCHROMIC GLASS
Energy lost through conventional windows accounts for approximately 30 percent of heating and cooling energy, according to the U.S. Department of Energy. Not with SageGlass. By adapting to the external climatic conditions, SageGlass minimizes energy use by reducing heating loads in winter, air conditioning in summer and electrical lighting all year long.
Conventional windows also cause glare and heat gain and require blinds and shades to offset the negative effects of the sun. SageGlass eliminates the need for additional solar shading systems, hence the use of additional energy and resource for their manufacturing, transportation and installation.
Also, if shades and blinds are used, not only does one have to clean the window but also clean and maintain the blinds. With SageGlass, there are no additional maintenance requirements besides keeping the glass clean, thus limiting the environmental impact of the building.
1 Source: "The Energy-Savings Potential of Electrochromic Windows in the US Commercial Buildings Sector", Building Technologies Program, Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory.