Metering must be continuous and data must be logged to allow for analysis of trends.
Metering must be continuous and data must be logged to allow for analysis of trends.
Employ system-level metering covering 40% (for one point) or 80% (for two points) of the total expected annual energy use.
Employ system-level metering covering 40% (for one point) or 80% (for two points) of the total expected annual energy use.
The ease of isolating consumption per end-use or mechanical system varies with factors like circuit configuration, equipment in use, and system type.
The ease of isolating consumption per end-use or mechanical system varies with factors like circuit configuration, equipment in use, and system type.
Electric loads with isolated circuits are often easier to submeter than natural gas equipment because you can monitor a greater percentage of energy use from a single point—which means fewer meters and lower costs.
Electric loads with isolated circuits are often easier to submeter than natural gas equipment because you can monitor a greater percentage of energy use from a single point—which means fewer meters and lower costs.
Use the audit information to submeter those systems that have highest variability, or systems that have experienced energy management problems in the past.
Use the audit information to submeter those systems that have highest variability, or systems that have experienced energy management problems in the past.
Prior to installing the meters, consider using a submeter vendor to perform an audit to determine which equipment and subsystems are the best candidates for submetering. Factors to consider include the variability of energy use of a given system, the amou
Prior to installing the meters, consider using a submeter vendor to perform an audit to determine which equipment and subsystems are the best candidates for submetering. Factors to consider include the variability of energy use of a given system, the amount of energy it uses, and the ease of integrating submeters to monitor the systems energy use.
If necessary, install additional submeters to meet the credit requirements.To earn one point, 40% of total, annual expected energy consumption, and at least 80% of at least one of the two largest energy use applications, must be submetered.To earn two poi
Tenant energy use is not considered an acceptable end use according to these credit requirements. That said, if the breakdown includes tenant energy broken into additional end uses - such as lighting, plug loads, tenant-owned HVAC - then these can contribute to the overall submetering scheme.
When listing the type of subsystem, use general categories rather than specific system types, manufacturers, and model numbers. This allows LEED reviewers to more easily understand whether your project meets the credit requirements.
When listing the type of subsystem, use general categories rather than specific system types, manufacturers, and model numbers. This allows LEED reviewers to more easily understand whether your project meets the credit requirements. Examples include heating, cooling, ventilation (fans), lighting, etc.
The energy-use breakdown should be reported in kbtus. Conversion to kbtus of alternate energy units like kilowatt hours (kWh) or therms may be required. Conversion calculators are widely available online to assist with this calculation.
The energy-use breakdown should be reported in kbtus. Conversion to kbtus of alternate energy units like kilowatt hours (kWh) or therms may be required. Conversion calculators are widely available online to assist with this calculation.
The total annual energy usage reported in your energy-use breakdown must be within 10% of the total annual energy use reported in EAc1. The annual energy use reported for EAc1 is derived directly from utility bills whereas the breakdown reported for this
The total annual energy usage reported in your energy-use breakdown must be within 10% of the total annual energy use reported in EAc1. The annual energy use reported for EAc1 is derived directly from utility bills whereas the breakdown reported for this credit is derived from commissioning or auditing activities, utility bills, or spot or other metering.