Optimize Energy Performance

To reduce the environmental and economic harms of excessive energy use by achieving a minimum level of energy efficiency for the building and its systems.
  • Moderate indoor temperature
  • Reduce heating and cooling loads
  • Shift peak heating and cooling loads to off-peak hours

Direct support of technical goals.

Note: ranges of LEED credit points include all specialties (New Construction, etc.) within a given rating system (BDCv3, etc.); highest point total may only apply to certain specialties.

CGreen 5.201.1
CHPS EE1.0 Prereq.: 8 pts.;
EE1.1: up to 40 pts.
GGlobes 3.3.1: up to 100 pts.
BDCv3 EAp2 Prereq.; EAc1: up to 24 pts.
NDv3 GIBp2 Prereq.; GIBc2: up to 2 pts.
BDCv4 EA Minimum / Optimize energy performance: Prereq.; up to 20 pts.
NDv4 GIB Minimum / Optimize building energy performance: Prereq.; up to 2 pts.
Applicable
Products /
Systems
  • Concrete unit masonry

Concrete masonry can harvest site energy using passive solar designs and decrease the size of HVAC systems. It has high thermal mass and specific heat, providing very effective thermal storage. The result is a beneficial lag between peak heating and cooling loads and outside temperature peaks, thereby delaying needed heating or cooling and lowering associated energy demand.

Interior walls act as heat-sinks to moderate indoor temperature swings, further reducing heating/cooling loads. Whole-building analysis programs capable of projecting a building's energy use and cost based on an hour-by-hour simulation can accurately model concrete masonry's thermal mass and predict associated savings.

The 2016 CEC recognizes the value of heavy mass walls (with concrete masonry units (CMU) in its definition); for most metro areas in Southern California, no insulation is required. Please see California Energy Code References, a quick reference guide to concrete masonry in the energy code.

Optimize Energy Performance