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Guideline E.1: Energy Efficiency
Intent
To establish and meet the building energy and carbon performance standard in design and operation in order to significantly reduce carbon dioxide emissions and lower energy use. Guidelines E.1C is required only for New Construction projects that include 20,000 gsf or more of conditioned space and Major Renovation projects that include 20,000 gsf or more of conditioned space and include construction, replacement, or alteration of relevant systems or assemblies.
Required Performance Criteria
- Meet the MN SB 2030 Energy and Carbon Standard, information on which can be found at b3mn.org/2030energystandard. Project submissions, results, and compliance are tracked through the B3 Guidelines Tracking Tool.
- Document aggregate totals by energy type for predicted and actual energy use.
- Implement submetering and end-load disaggregation.Separately meter and separately report the following:
- HVAC system electrical energy use.
- Energy use for at least one of the following space conditioning loads: heating, cooling, or ventilation. Metered energy may include natural gas, steam, chilled water, or electricity.
- Interior lighting energy use.
- Exterior lighting energy use.
- Plug loads energy use.
- At least one nonregulated load.
Nonregulated loads may include the following: cooking equipment, compressed air systems, specialized equipment in laboratories, hospitals, and manufacturing plants, or nonrefrigeration related process loads. If no such nonregulated loads exist, submeter and report one additional regulated load to fulfill item six above. Regulated loads may include: heating, cooling, ventilation, service water heating, motors, transformers, vertical transportation, refrigeration equipment, computer room cooling equipment and other systems, and other components and processes described in ASHRAE 90.1 sections 5 through 10. [1]
Metering requirements for whole-building electrical use, whole HVAC system, interior and exterior lighting, and plug loads are aligned with ASHRAE 90.1 2013 and ASHRAE 90.1 2016, which are under consideration for the Minnesota State Energy Code in 2020. Going beyond ASHRAE 90.1, compliance with Guideline E.1 requires metering and reporting two additional energy loads—one specifically from the HVAC system(s) and a second regulated or nonregulated load. Meters installed must be capable of reporting data that enable building operators to track energy consumption over time (kWh, BTU, etc.).
This guideline outlines a metering approach intended to permit projects to have actionable data on their energy consumption. The SB 2030 Program has related requirements intended to parallel this metering approach and permit the project to be tracked against its SB 2030 Standard in operation. The requirements under the SB 2030 program include the development of a metering plan and a consideration of how to meter any process loads that are outside of the SB 2030 project boundary. Consult the SB 2030 Metering Requirements listed on the SB 2030 project website for specifics, including the metering-plan format.
[1] ASHRAE 90.1 2016
Recommended Performance Criteria
- Advanced submeteringInstall permanent meters capable of recording and transmitting data to a remote location at one-hour intervals (or less), sufficient to either:[1]
- Meter and report any individual end-use that represents more than 10% of the predicted annual total energy consumption.
- Meter and report separate energy loads, which together account for at least 90% of predicted annual energy consumption by end-use.[2]
- Display real-time energy metering information to building occupants.[3]
[1] This guideline is aligned with portions of USGBC, “Energy and Atmosphere Credit: Advanced Energy Monitoring,” LEED Building Design and Construction v.4 and BREEAM, ENE02a.
[2] End-use may include more detailed energy use categories than included under Part C or the metering of additional large building loads sufficient to capture 90% predicted energy consumption.
[3] This guideline is aligned with BREEAM, ENE02b: Energy Monitoring.