Understanding Net Zero
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Net zero buildings (also known as zero energy buildings) produce as much energy as they consume on-site through renewable sources, often remaining connected to the grid for supplemental energy. They help reduce energy costs, greenhouse gas emissions, and increase energy security, addressing the significant energy consumption and emissions originating from buildings. Ideal net zero buildings typically include low-rise structures with dedicated owners committed to sustainability, leveraging various energy-efficient infrastructures and renewable technologies.
Understanding Net Zero
- 3. Four Names, One Meaning Net Zero Buildings Zero Energy Buildings (ZEBs) Zero Net Energy Buildings (ZNEBs) NetZero Energy Buildings (NZEBs)
- 4. “Buildings that use no more energy over the course of the year than they produce from on-site renewable sources.” -New Buildings Institute
- 6. So are net zero buildings off-grid buildings?
- 7. So are net zero buildings off-grid buildings?
- 8. Net Zero Buildings are typically connected to the grid so that they may consume energy in times of low on-site production. But, in times of high production, they offload excess energy to the grid, thereby minimizing total, or net, usage.
- 9. Why is “net zero” helpful?
- 10. Why is “net zero” helpful? 1. Reduced energy consumption and cost
- 11. Why is “net zero” helpful? 1. Reduced energy consumption and cost 2. Reduced greenhouse gas emissions
- 12. Why is “net zero” helpful? 1. Reduced energy consumption and cost 2. Reduced greenhouse gas emissions 3. Increased energy security
- 14. Why is “net zero” helpful? 1. Buildings consume 40% of primary energy in the US. Source: U.S. Energy Information Administration
- 15. Why is “net zero” helpful? 1. Buildings consume 40% of primary energy in the US. 2. Total US utility bill topped $369B in 2009. Source: U.S. Energy Information Administration
- 16. Why is “net zero” helpful? 1. Buildings consume 40% of primary energy in the US. 2. Total US utility bill topped $369B in 2009. 3. Buildings account for 40% of green house gas emissions. Source: Whole Building Design Guide
- 17. Ideal Buildings for Net Zero… • Are low-rise one or two story buildings. • Have minimal plug and process energy needs. • Have owners who are highly invested in sustainability.
- 18. Ideal Buildings for Net Zero are… • Unrefrigerated warehouses • Churches • Retail • Schools • Public assembly halls • Outpatient healthcare facilities • Certain professional offices
- 19. Getting to Zero • High Performance Building Envelopes – Windows – Infiltration – Roof – Walls – Floor PhotoSource:EPA
- 20. Getting to Zero • Energy efficient infrastructure – Daylighting – Energy efficient HVAC – HE lighting – Cool roof – Natural vent – Hi R-value glazing
- 21. Getting to Zero • Leveraging renewable technologies – Photovoltaic solar – Wind turbine – Geothermal – Low-impact hydropower – Biofuels – Waste-to-energy – Hydropower – RECs ON-SITE OFF-SITE
- 22. 3 Examples to Learn More • Net Zero Energy Modern House • The David & Lucile Packard Foundation • The Omega Center for Sustainable Living