Established by the United States Green Building Council (USGBC) in 1998, the LEED® (Leadership in Energy and Environmental Design) rating system is a premier benchmark for sustainable design.
Vitro Architectural Glass (formerly PPG glass) has a long history of helping architects incorporate many of the principles codified in the LEED rating system. Most recently, we led the development of many of North America’s most specified low-emissivity (low-e) glasses, including Solarban® 90 glass, the most preferred high-performance solar control low‑e glass in North America.
Energy & Atmosphere (EA)
LEED designates several ways to earn points across nine credit categories. However, the category with the greatest potential to help you earn LEED credits through glass selections is the Energy & Atmosphere (EA) category.
With up to 20 possible points to earn, the EA category, according to the USGBC, “approaches energy from a holistic perspective, addressing energy use reduction, energy-efficient design strategies, and renewable energy sources.”
This objective seems tailored for the use of energy-efficient solar control or passive low-e glass. The applicable credit, “Optimize Energy Performance,” offers two paths through which specifiers can leverage Vitro Architectural Glass products and resources.
Option 1: Whole Building Energy Simulation
This option requires that you demonstrate a measurable improvement in the building’s energy performance compared to the baseline building performance rating. Criteria for the Prerequisite Minimum Energy Performance must be followed to demonstrate a percentage improvement.
Depending on the building type and level of energy savings, between 1 and 20 LEED points can be earned—up to 16 points for schools, up to 20 for healthcare facilities and up to 18 for other building types.
The minimum energy cost savings percentage for each point threshold is as follows:
| New Construction | Major Renovation | Core and Shell | Points (Except Schools, Healthcare) | Points Healthcare | Points Schools |
|---|---|---|---|---|---|
| 6% | 4% | 3% | 1 | 3 | 1 |
| 8% | 6% | 5% | 2 | 4 | 2 |
| 10% | 8% | 7% | 3 | 5 | 3 |
| 12% | 10% | 9% | 4 | 6 | 4 |
| 14% | 12% | 11% | 5 | 7 | 5 |
| 16% | 14% | 13% | 6 | 8 | 6 |
| 18% | 16% | 15% | 7 | 9 | 7 |
| 20% | 18% | 17% | 8 | 10 | 8 |
| 22% | 20% | 19% | 9 | 11 | 9 |
| 24% | 22% | 21% | 10 | 12 | 10 |
| 26% | 24% | 23% | 11 | 13 | 11 |
| 29% | 27% | 26% | 12 | 14 | 12 |
| 32% | 30% | 29% | 13 | 15 | 13 |
| 35% | 33% | 32% | 14 | 16 | 14 |
| 38% | 36% | 35% | 15 | 17 | 15 |
| 42% | 40% | 39% | 16 | 18 | 16 |
| 46% | 44% | 43% | 17 | 19 | - |
| 50% | 48% | 47% | 18 | 20 | - |
These savings projections can include regulated (non-process) energy loads, such as interior lighting, heating and air conditioning (HVAC)—all areas in which low-e glass can make an impact. According to U.S. Department of Energy’s 2012 Buildings Energy Data Book, 61 percent of a building’s total energy use consists of HVAC, ventilation and artificial lighting costs.
Solar control low-e glass coatings help reduce energy usage through reduced solar heat gain coefficients (SHGCs) and higher light-to-solar gain (LSG) ratios to optimize light while retaining cooler air—thereby reducing artificial lighting and air conditioning requirements and costs.
Passive low-e glass helps reduce heating usage by retaining solar and furnace heat. Their higher SHGCs are designed for passive solar applications, with lower LSG ratios and higher U-Values to retain warmer air.
Option 2: Prescriptive Compliance: ASHRAE Advanced Energy Design Guide
If the requirements outlined in option 1 cannot be met, up to six points can be earned through option 2: ASHRAE Advanced Energy Design Guide, which requires compliance with recommendations and standards outlined in LEED Chapter 4, Design Strategies and Recommendations by Climate Zone, for the appropriate ASHRAE 50% Advanced Energy Design Guide and climate zone.
Within this option, four paths exist for different building types:
1. ASHRAE 50% Advanced Energy Design Guide for Small to Medium Office Buildings (4 points available)
2. ASHRAE 50% Advanced Energy Design Guide for Medium to Large Box Retail Buildings (6 points available)
3. ASHRAE 50% Advanced Energy Design Guide for K–12 School Buildings (5 points available)
4. ASHRAE 50% Advanced Energy Design Guide for Large Hospitals (5 points available)
How Vitro Architectural Glass Can Help
Whether you’re pursuing LEED points through Option 1 or Option 2 (or other LEED categories), Vitro Architectural Glass offers products and online tools to help you estimate, compare and document potential energy savings.
Products
Use Vitro Glass products such as Solarban® solar control low-e and Sungate® passive low-e glasses in combination with clear, ultra-clear and performance-tinted glasses to achieve the optimal balance of aesthetics and performance.
Product Performance Data Tables
Use critical performance data to select glass products with superior performance metrics including solar heat gain coefficient (SHGC), U-Value, visible light transmittance (VLT) and other variables.
Construct Tool
Compare virtual glazing configurations from Vitro Glass and other glass manufacturers.
Find Glass Products
Use the Vitro GlassFinder™ to input color, VLT, SHGC, U-Value, reflectance and other important data to generate glass product comparisons.
Thermal Stress Analysis Tool
Model the potential impact of glass type, coating types, coating locations, shading patterns and more to minimize the threat of thermal stress breakage.
Vitro emissions™ Calculator
Model energy consumption, embodied carbon and operational carbon emissions in a range of standard buildings in North America.
VitroSphere™ Digital Glass Simulator
Explore, visualize and compare Vitro’s range of Solarban® glass products across different building types with the click of a button.
For information about Vitro’s commitment to sustainable products and practices, please visit vitroglazings.com/sustainability. For any other glass questions, please contact Vitro Glass or call 1-855-VTRO-GLS (1-855-887-6457).
Updated on October 10, 2024
