Energy Demand-Efficiency-Renewables Hierarchy
Definition
The energy hierarchy is to reduce loads first, meet those loads efficiently second, supply the remaining demand with lower-impact renewable energy third, and continuously verify actual performance.
Sourced Facts
- The guide begins with conservation and demand reduction, including passive use of daylight, thermal mass, natural ventilation, solar orientation, and occupant feedback. PDF p. 72; guide p. 65 PDF p. 73; guide p. 66
- After demand reduction, efficiency means using less energy for the same work; envelope improvements may reduce required HVAC capacity through system synergy. PDF p. 74; guide p. 67 PDF p. 75; guide p. 68
- Remaining demand can be addressed through on-site generation or off-site renewable-energy mechanisms described by the guide. PDF p. 76; guide p. 69
- Monitoring, commissioning, owner requirements, staff training, maintenance, and occupant engagement are needed to sustain performance. PDF p. 76; guide p. 69 PDF p. 77; guide p. 70
Interpretation
Interpretation
Size active systems only after passive and load-reduction measures are represented. Keep the predicted-to-measured feedback loop active after occupancy so design efficiency does not remain merely modeled efficiency.
Evidence
- Primary pages: PDF p. 71; guide p. 64, PDF p. 72; guide p. 65, PDF p. 73; guide p. 66, PDF p. 74; guide p. 67, PDF p. 75; guide p. 68, PDF p. 76; guide p. 69, and PDF p. 77; guide p. 70
- Source note: LEED Core Concepts Guide - Third Edition > Energy and Atmosphere