by Conor Rielly and Scott Waddell
In the race to combat climate change, the focus on building decarbonization has become more critical than ever. Buildings are major contributors to CO2 emissions and demand a paradigm shift in design and sustainability. This guide outlines three pivotal steps that building owners and designers can take to drive progress toward a decarbonized future.
Step 1: Optimizing Passive Systems for Carbon Reduction
The first key step in building decarbonization involves optimizing passive systems, including the building envelope and structural elements. Passive design principles emphasize creating aesthetically pleasing spaces that reduce reliance on active, energy-consuming systems. For instance, careful material selection, such as locally sourced timber over high-embodied carbon materials like concrete, can enhance both aesthetics and sustainability.
Window choices also have an impact on thermal performance. By incorporating punched or ribbon windows within an insulative envelope, buildings not only achieve superior thermal performance, but also reduce embodied carbon leading to energy savings and improved occupant comfort.
Step 2: Optimizing Active Systems for Operational Efficiency
Decarbonization extends beyond design aesthetics to high-performance active systems, such as HVAC systems and intelligent energy systems. Hydronic (water-based) systems are more efficient than air-based systems; benefits include smaller piping, cost savings, and improved indoor air quality. It is also of benefit to utilize internal heat transfer within buildings, which mirrors the human body’s approach to warmth regulation.
Like the blood in our bodies, buildings can mimic our human biology by using water to move that internal warmth to the perimeter as well.
HVAC system efficiency, with a focus on reducing energy consumption through coordinated designs and optimizing airflow, is also important. By understanding the dual roles of building conditioning and ventilation, designers can significantly impact energy use and overall building performance.
Step 3: Providing Renewables for Net Zero Energy
The final step centers on achieving net-zero energy by balancing a building’s consumption with renewable energy production. Reliance on renewables can be minimized by optimizing both passive and active systems. Financing options such as power purchase agreements, leasing programs, and incentives, are crucial tools for implementing renewable energy strategies.
Building decarbonization, as outlined in this guide, transcends environmental initiatives. It represents a paradigm shift in design and sustainability, offering a collaborative path toward a healthier, sustainable future. By embracing these principles, stakeholders can contribute to safeguarding our planet while serving the needs of current and future occupants. This three-step approach forms the cornerstone for future-proofing our built environment and fostering a positive impact on the global climate crisis.
View the full guide at www.cannondesign.com/perspectives/powering-progress-3-steps-toward-building-decarbonization.
Conor Rielly, WELL AP is building performance leader, and Scott Waddell, AIA, LEED AP, WELL AP, CPHC is architect and sustainability coordinator, in CannonDesign’s Boston office.
