Achieving LEED certification under version 4.1 is an opportunity for project teams to demonstrate leadership in sustainable design and operations. Two critical categories, Energy and Atmosphere (EA) and Water Efficiency (WE), not only contribute significantly to a project’s environmental impact but also offer substantial opportunities to maximize points. Here are practical strategies to optimize performance in these categories.
Energy Efficiency: Key Tactics for High Performance
Energy use is one of the most significant contributors to a building’s environmental footprint. LEED v4.1 focuses on reducing greenhouse gas emissions and improving energy performance. To maximize points:
Optimize Energy Performance: Projects can earn up to 18 points by demonstrating energy cost savings compared to ASHRAE 90.1-2016. Implementing energy modeling early in the design phase can help identify opportunities for improvements. Simple measures, such as better insulation, high-efficiency HVAC systems, and advanced lighting controls, can significantly enhance energy performance.
Incorporate Renewable Energy: The Renewable Energy credit combines previous categories into one, rewarding projects that use on-site or off-site renewable energy sources. Generating solar or wind power on-site or participating in green power procurement programs helps offset energy use while earning up to 5 points.
Advanced Energy Metering and Grid Harmonization: Advanced metering supports continuous improvement by tracking performance data. Coupled with strategies like load flexibility, participation in demand response programs, or battery storage solutions, projects can support grid decarbonization and earn additional points.
Water Efficiency: Reducing Consumption for Maximum Impact
Water use reduction is another vital area of focus. LEED v4.1 emphasizes both indoor and outdoor water efficiency, with updated thresholds and new strategies for challenging project types. To maximize points:
Indoor Water Use Reduction: Projects are rewarded for using water-efficient fixtures such as low-flow faucets, dual-flush toilets, and waterless urinals. Beyond fixtures, consider reusing water within the building, such as greywater for toilet flushing. Achieving reductions beyond the baseline can yield up to 6 points.
Resource Optimization
One hallmark of LEED-certified homes and multifamily midrise projects is the emphasis on durability and environmental responsibility. Durability management is a required component, encouraging the use of materials and construction techniques that minimize wear and tear, thereby reducing the need for frequent replacements. Projects that go further by adopting third-party verified durability plans earn points under the “Durability Management Verification” credit. This approach not only saves resources but also enhances the long-term value of the building.
Outdoor Water Use Reduction: Efficient landscaping strategies, including native or drought-tolerant plants, mulching, and efficient irrigation systems, contribute to outdoor water savings. Where feasible, rainwater harvesting systems can provide supplemental irrigation water. Projects can earn up to 2-3 points for substantial reductions in outdoor water use.
Cooling Tower and Process Water Efficiency: For buildings with significant cooling needs, optimizing cooling tower operation is key. Strategies include monitoring water chemistry, using alternative water sources, and minimizing blowdown waste. These measures contribute to both water and energy efficiency.
By focusing on these targeted strategies, project teams can significantly improve their LEED and Mostadam scores in the EA and WE categories while aligning with global sustainability goals. With thoughtful design and implementation, it is possible to reduce resource consumption, lower operating costs, and achieve higher levels of certification under LEED v4.1.
