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Dance Partners: How to Gracefully Integrate Building Form and Enclosure with HVAC
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Dance Partners: How to Gracefully Integrate Building Form and Enclosure with HVAC Cheryl Saldanha PE has deep expertise in building science. James Petersen PE has deep expertise in HVAC. They both have demonstrated for many years that the design of the building form and enclosure and the HVAC system must be in sync for a truly successful outcome. Cheryl and James have combined their expertise on many projects to reduce operational and embodied carbon. When a building form is efficient (low ratio of enclosure area to conditioned space), applying common sense modeling, the integrated design of enclosure with HVAC dramatically reduces both embodied carbon and operating carbon, and the associated costs. Session Presentations What Success Looks Like: HVAC Integrated with the Building Form and Enclosure From our multi-family passive house projects in the northeast US, we aim to reduce Energy Use Intensity from a national average of 60 to 30 kbtu/sf/yr through integrated design involving architects and engineers. Efficient building forms and optimized enclosure systems are key to balancing embodied and operational carbon emissions. We will demonstrate how reducing operational carbon without considering form and enclosure details can increase embodied carbon. We show how efficient building forms use fewer materials, and optimized enclosure assemblies place insulation only where truly necessary, lowering heating/cooling loads and reducing embodied carbon for materials, equipment, and accessories. What Success Looks Like: HVAC Integrated with the Building Form and Enclosure Since his first passive house project in 2010 James Petersen, PE has been engineer-of-record for 65 large passive house projects totaling 5000 units of high-performance housing. HVAC systems are dramatically downsized and simplified when integrated with the building form and enclosure. Successful integration decreases space heating and cooling in buildings that often reduce overall building operating energy/carbon by 50%. Building science knowledge and collaboration with the enclosure design substantially reduces operating carbon and, small and simple HVAC systems significantly reduce embodied carbon. Modeling trade-offs is key to reducing operational and embodied carbon in both HVAC systems and the building enclosure. | ||