Emergent Metering

Presentations

Slide decks and technical presentations on metering and energy management covering IECC 2021, ASHRAE 90.1, LEED v4.1 code requirements, kWh metering technology, water and BTU measurement fundamentals, and gas and steam flowmeter selection — designed for MEP engineers, facility managers, and energy consultants. Fill in a few details to unlock the inline slide viewer.

Energy Metering & Submetering Code Requirements — A Guide for MEP Engineers

IECC 2021, ASHRAE 90.1, and LEED v4.1 Requirements for New Construction & Major Renovations.

12 slides

Overview

A practical walkthrough of the energy metering and submetering requirements MEP engineers, commissioning authorities, and owner's representatives must satisfy on new construction and major renovation projects. The deck reconciles the three documents that drive most U.S. metering scopes — the 2021 International Energy Conservation Code (IECC), ASHRAE 90.1-2019/2022, and LEED v4.1 BD+C — and translates each clause into specific meter counts, accuracy classes, data-interval, and reporting obligations that belong in your basis-of-design and specification sections.

What you'll learn

  • Identify which buildings trigger whole-building and end-use submetering under IECC C405.12 and ASHRAE 90.1 Section 8.4.3.
  • Translate code language into accuracy class, sampling interval, and data-retention requirements for each metered load.
  • Earn the LEED v4.1 EA Prerequisite Building-Level Energy Metering and the Advanced Energy Metering credit on BD+C projects.
  • Specify revenue-grade vs. check-meter equipment without over-engineering the design.
  • Coordinate metering scope between the electrical, mechanical, and controls divisions to avoid duplicated or missing meters.

Topics covered

  • IECC 2021 Section C405.12 metering thresholds and exemptions
  • ASHRAE 90.1 Section 8.4.3 — energy monitoring requirements
  • LEED v4.1 BD+C EA Prerequisite & Advanced Energy Metering credit
  • Tenant submetering, Title 24, and local stretch-code overlays
  • Accuracy classes (IEC 61557-12, ANSI C12.20) explained
  • BACnet, Modbus, and SkySpark/Niagara data-collection architectures
  • Specification language, commissioning, and verification checklists

Who it's for

  • MEP and electrical design engineers
  • Commissioning authorities and energy modelers
  • LEED APs and sustainability consultants
  • Owner's project managers and facility directors

Standards & codes referenced

  • IECC 2021 — C405.12
  • ASHRAE 90.1-2019 / 90.1-2022 — §8.4.3
  • LEED v4.1 BD+C — EA Prerequisite & Credit
  • ANSI C12.20 / IEC 61557-12 accuracy classes
IECC 2021 metering requirementsASHRAE 90.1 energy meteringLEED v4.1 advanced energy meteringsubmetering code complianceMEP engineering metering specificationbuilding energy monitoring
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Emergent Metering

Energy Metering &
Submetering Code Requirements

A Guide for MEP Engineers — IECC 2021, ASHRAE 90.1, and LEED v4.1 Requirements for New Construction & Major Renovations

IECC 2021 · Section C405.12ASHRAE 90.1 · Section 8.4.3LEED v4.1 · EA Credits

Emergent Energy Solutions · www.emergentenergy.us · 215-645-7141

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How Energy Metering Works — A Comprehensive Guide to Kilowatt-Hour (kWh) Metering

Technology, Applications, Code Requirements & Best Practices.

16 slides

Overview

An end-to-end primer on how electricity is measured in commercial and industrial buildings, from the physics of voltage and current sensing through the selection of revenue-grade meters and the architecture of an enterprise energy-management platform. Built for engineers and facility teams who need to understand not just what a kWh meter does, but how to size CTs, wire delta vs. wye services, interpret power-quality data, and choose between solid-core, split-core, and Rogowski coil sensors on retrofit projects.

What you'll learn

  • Explain how voltage, current, power factor, and harmonics combine into a true kWh reading.
  • Choose between solid-core CTs, split-core CTs, Rogowski coils, and self-powered wireless sensors for new vs. retrofit work.
  • Size current transformers and PT ratios for 120/208 V, 277/480 V, and 600 V services.
  • Distinguish revenue-grade (ANSI C12.20 Class 0.2/0.5) from check-meter accuracy and know when each is required.
  • Design a metering network using Modbus RTU/TCP, BACnet/IP, and gateway-based wireless mesh for circuit-level visibility.

Topics covered

  • Fundamentals: voltage, current, real vs. apparent power, power factor
  • Single-phase, split-phase, and 3-phase wye/delta service topologies
  • Current transformer selection, sizing, and burden calculations
  • Revenue-grade vs. check-metering accuracy and certification
  • Wireless self-powered sensors (Panoramic Power) vs. wired panel meters (Accuenergy, Leviton/Obvius, Veris)
  • Communication protocols — Modbus, BACnet, SNMP, MQTT
  • Data aggregation with Tridium Niagara and cloud dashboards
  • Common installation mistakes, CT polarity, and troubleshooting

Who it's for

  • Electrical engineers and panel designers
  • Energy managers and sustainability leads
  • Facility managers planning a submetering rollout
  • Controls integrators and systems contractors

Standards & codes referenced

  • ANSI C12.20 — Class 0.2 / 0.5 revenue metering
  • IEC 61557-12 — Performance of measuring and monitoring devices
  • UL 2808 — Energy Monitoring Equipment
kWh meteringcurrent transformer sizingrevenue grade metersubmetering best practicesPanoramic Power wireless meteringModbus BACnet energy meterelectrical submeter selection
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EMERGENT ENERGY SOLUTIONS

How Energy Metering Works

A Comprehensive Guide to Kilowatt-Hour (kWh) Metering — Technology, Applications, Code Requirements & Best Practices for Commercial and Residential Facilities

Billing & Cost AllocationEnergy ManagementCode ComplianceSustainabilityFault DetectionROI & Payback
sales@emergentenergy.us · 215-645-7141 · www.emergentenergy.usEmergent Metering
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Gas & Steam Metering Fundamentals

A Comprehensive Guide to Gas Flow Measurement and Steam Energy Metering: Technology, Applications, Safety & Best Practices.

12 slides

Overview

A field guide to the trickiest flow-measurement problem in commercial and industrial buildings: compressible gases and saturated or superheated steam. The deck explains how thermal mass, differential-pressure, vortex, and Coriolis meters each handle the density, temperature, and pressure variations that wreck a standard flow reading, and how to convert raw flow into the MMBTU, therms, and lb/hr units utilities and tenant chargeback programs actually bill on.

What you'll learn

  • Pick the right meter for natural gas, compressed air, nitrogen, CO₂, and steam service.
  • Apply pressure and temperature compensation to convert ACFM → SCFM → MMBTU.
  • Specify steam meters for saturated vs. superheated service and understand condensate management.
  • Meet hazardous-location (Class I Div 2 / ATEX) and intrinsically safe requirements.
  • Integrate gas and steam data into a single energy dashboard alongside electric and water.

Topics covered

  • Thermal mass flowmeters for compressed air and natural gas (Sage, Fluid Components, Sierra)
  • Vortex shedding meters for steam and high-temperature gas
  • Differential-pressure: orifice plates, averaging Pitot, and Venturi
  • Coriolis mass flow for high-accuracy custody transfer
  • Steam properties — saturated vs. superheated, quality, condensate
  • Pressure / temperature compensation and AGA-7/AGA-9 calculations
  • Hazardous-area classifications and safe installation practice
  • Reporting in therms, MMBTU, lb/hr, and CO₂e

Who it's for

  • Plant and process engineers in industrial facilities
  • MEP engineers specifying gas and steam submeters
  • Energy managers in hospitals, universities, and district-energy systems
  • Sustainability teams tracking Scope 1 emissions

Standards & codes referenced

  • AGA Report No. 7 — turbine gas meters
  • AGA Report No. 9 — ultrasonic gas meters
  • ASME MFC-3M — orifice plate measurement
  • NFPA 70 / ATEX hazardous-location requirements
natural gas flow metersteam meteringthermal mass flow metervortex flow metercompressed air meteringMMBTU calculationindustrial submetering
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🔥♨️

Gas & Steam Metering Fundamentals

A Comprehensive Guide to Gas Flow Measurement and Steam Energy Metering — Technology, Applications, Safety, Code Requirements & Best Practices for Commercial and Industrial Facilities

Emergent Energy Solutions|emergentmetering.comEmergent Metering
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Water Metering & BTU Measurement Fundamentals

Flow measurement, thermal/chilled-water BTU energy, accuracy classes, and meter sizing for hydronic systems.

11 slides

Overview

An engineering-first reference for measuring water flow and the thermal energy carried by chilled, hot, and condenser water loops. The deck breaks down how electromagnetic, ultrasonic transit-time, turbine, and insertion meters perform across clean and dirty service, how matched-pair RTDs deliver the ±0.1 °F ΔT accuracy a BTU calculation depends on, and how to size each meter so the actual operating flow lands inside the meter's rated turndown — the single biggest cause of inaccurate chilled-water billing on real buildings.

What you'll learn

  • Apply the BTU formula (500 × GPM × ΔT for water; corrected for glycol) and explain why ΔT accuracy dominates total uncertainty.
  • Select between electromagnetic, ultrasonic, turbine, and insertion flowmeters based on pipe size, fluid cleanliness, and turndown.
  • Map ISO 4064 (Class 1 / Class 2) and AHRI 600 BTU-meter accuracy classes to a real chargeback specification.
  • Size a meter so that minimum, average, and peak GPM all fall inside its accurate operating band.
  • Specify matched RTD pairs, well placement, and straight-run requirements to protect chilled-water billing accuracy.
  • Meet ASHRAE 90.1, LEED v4.1, and local chilled-water chargeback program requirements.
  • Design accurate domestic-water and irrigation submetering for tenant and sustainability reporting.

Topics covered

  • Water flow fundamentals — laminar vs. turbulent, Reynolds number, profile development
  • Electromagnetic (mag) flowmeters — full-bore and insertion styles
  • Ultrasonic transit-time meters — clamp-on retrofit and inline configurations
  • Turbine, paddlewheel, and positive-displacement meters
  • BTU calculation: 500 × GPM × ΔT, with glycol density and Cp corrections
  • Matched RTD pairs, thermowell placement, and ΔT uncertainty
  • ISO 4064 accuracy classes, AHRI 600 certification, and OIML R49
  • Sizing for turndown — protecting accuracy at minimum design flow
  • BMS integration via Modbus RTU/TCP and BACnet/IP
  • Chilled-water tenant chargeback design patterns
  • Ton-hour math and glycol correction factors
  • Matched-pair temperature sensors and BTU calculators (Onicon, Spirax Sarco, Badger)
  • Pipe sizing, straight-run requirements, and common installation pitfalls

Who it's for

  • Mechanical engineers designing hydronic and central-plant systems
  • Energy and sustainability managers running chargeback programs
  • Commissioning agents verifying chilled-water performance
  • Facility teams in district-energy or campus environments
  • Property managers running tenant chilled-water chargeback programs

Standards & codes referenced

  • ISO 4064 — water meter accuracy classes
  • AHRI 600 — performance rating of BTU meters
  • OIML R49 — water meters for cold and hot potable water
  • ASHRAE 90.1 §8.4.3 — thermal energy monitoring
  • LEED v4.1 BD+C — Advanced Energy Metering
water meteringBTU meterchilled water energythermal energy measurementmatched RTD pairelectromagnetic flow meterultrasonic flow meter sizingultrasonic clamp-on meterwater submeteringtenant chargeback chilled water

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Water Metering & BTU Measurement Fundamentals

Flow measurement, thermal/chilled-water BTU energy, accuracy classes, and sizing for hydronic systems.

ISO 4064AHRI 600ASHRAE 90.1 §8.4.3

Emergent Metering · emergentmetering.com

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Gas & Steam Flowmeter Selection Guide

Vortex and steam metering, sizing, accuracy classes, and pressure/temperature compensation for compressible flow.

12 slides

Overview

A working engineer's guide to the hardest flow problem in commercial and industrial buildings: compressible gases and saturated or superheated steam. The deck explains how vortex, thermal mass, differential-pressure, and Coriolis meters each handle density, pressure, and temperature variation, and how to size a line so the meter sees enough velocity at minimum flow to stay above its low-end cutoff without exceeding its rated maximum at peak demand. Includes worked examples for natural gas, compressed air, and saturated steam at typical campus and industrial conditions.

What you'll learn

  • Choose between vortex, thermal mass, DP, and Coriolis meters for gas and steam service.
  • Apply pressure and temperature compensation to convert ACFM → SCFM and lb/hr → MMBTU.
  • Size a line and select a meter so minimum, average, and peak flow fall inside the accurate band.
  • Specify accuracy classes for custody transfer, allocation, and check-meter applications.
  • Meet hazardous-location (Class I Div 2 / ATEX) and intrinsically safe installation rules.

Topics covered

  • Compressible-flow fundamentals — density, viscosity, Reynolds number
  • Vortex shedding meters for steam, gas, and high-temperature service
  • Thermal mass flowmeters for natural gas and compressed air
  • Differential-pressure: orifice plates, averaging Pitot, Venturi
  • Coriolis mass flow for high-accuracy custody transfer
  • Pressure/temperature compensation and AGA-7/AGA-9 calculations
  • Saturated vs. superheated steam — quality, condensate, and lb/hr conversion
  • Line sizing for turndown and minimum measurable flow
  • Hazardous-area classifications and safe installation
  • Reporting in therms, MMBTU, lb/hr, and CO₂e

Who it's for

  • MEP and plant engineers specifying gas and steam submeters
  • Energy managers in hospitals, universities, and industrial facilities
  • Controls integrators delivering BMS/EMS dashboards
  • Sustainability teams tracking Scope 1 fuel emissions

Standards & codes referenced

  • AGA Report No. 7 — turbine gas meters
  • AGA Report No. 9 — ultrasonic gas meters
  • ASME MFC-3M — orifice plate measurement
  • ASME MFC-6M — vortex flowmeters
  • NFPA 70 / ATEX hazardous-location requirements
steam flowmetergas meter selectionvortex flowmeterflow measurementthermal mass flow meterMMBTU calculationhazardous location metering

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Gas & Steam Flowmeter Selection Guide

Vortex and steam metering, sizing, accuracy classes, and pressure/temperature compensation for compressible flow.

Vortex · Thermal · CoriolisASME MFCAGA 7 / 9

Emergent Metering · emergentmetering.com

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BACnet, Modbus & SkySpark/Niagara: Metering Data Integration

Protocols, gateways, data aggregation, and dashboard architectures for an enterprise metering rollout.

13 slides

Overview

A field-to-cloud blueprint for getting meter data out of devices and into the analytics platforms facility, energy, and sustainability teams actually use. The deck covers the trade-offs between Modbus RTU and BACnet/IP at the field network layer, the role of edge gateways in normalizing time series and applying Haystack tags, and the integration patterns that move data into Tridium Niagara, SkySpark, and downstream BI tools without losing fidelity or flooding the network.

What you'll learn

  • Design a layered metering network: device → field bus → gateway → server → analytics platform.
  • Choose between Modbus RTU, Modbus TCP, BACnet/IP, and BACnet MS/TP for a given site.
  • Apply Project Haystack tagging so SkySpark and other analytics platforms auto-discover meters.
  • Plan polling intervals, alarm strategies, and historian retention to balance fidelity and storage.
  • Map common pitfalls — duplicate points, time-stamp drift, missing scaling factors — before commissioning.

Topics covered

  • Modbus RTU vs. Modbus TCP — wiring, addressing, register maps
  • BACnet/IP and BACnet MS/TP — objects, properties, and discovery
  • Edge gateways: Tridium JACE, Distech, Contemporary Controls, generic Linux
  • Tridium Niagara as the building-side aggregator and historian
  • SkySpark + Project Haystack tagging for analytics
  • MQTT, REST, and OPC UA paths to the cloud
  • Time-series storage, downsampling, and retention
  • Cybersecurity: segmentation, VLANs, authentication, firmware updates
  • Commissioning checklist for integrated meter networks
  • Common failure modes and how to diagnose them quickly

Who it's for

  • Controls and systems integrators delivering metering projects
  • MEP engineers writing Division 25 integration specifications
  • IT and OT teams managing converged building networks
  • Energy analytics and FDD application engineers

Standards & codes referenced

  • ANSI/ASHRAE 135 — BACnet protocol
  • Modbus Application Protocol Specification v1.1b3
  • Project Haystack 4 — tagging model
  • ISA/IEC 62443 — OT cybersecurity
BACnet meteringModbus energy meterSkySparkNiagara integrationProject Haystack taggingedge gatewaybuilding analytics

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BACnet, Modbus & SkySpark/Niagara

Protocols, gateways, data aggregation, and dashboard architectures for an enterprise metering rollout.

Modbus RTU/TCPBACnet/IPNiagara · SkySpark

Emergent Metering · emergentmetering.com

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LEED v4.1 & Building Energy Performance Standards (BEPS) Compliance

Credits, prerequisites, and BEPS reporting — the metering scope you actually need to satisfy both.

13 slides

Overview

A unified compliance playbook for two of the fastest-moving requirements in commercial real estate: LEED v4.1 EA metering credits and the wave of municipal Building Energy Performance Standards (BEPS) — DC BEPS, NYC LL97, Boston BERDO, Denver Energize, Washington's Clean Buildings Act, and more. The deck reconciles the metering scope each program asks for, identifies the data each one actually consumes (interval data vs. annual consumption vs. emissions), and shows where one revenue-grade whole-building meter plus a handful of end-use submeters satisfies both LEED and BEPS without duplicating work.

What you'll learn

  • Earn the LEED v4.1 EA Prerequisite (Building-Level Energy Metering) and Advanced Energy Metering credit.
  • Identify which BEPS jurisdictions require interval data vs. annual ENERGY STAR reporting.
  • Specify revenue-grade vs. check-meter accuracy classes by end use.
  • Map metering scope to ENERGY STAR Portfolio Manager and to local BEPS reporting portals.
  • Plan a single metering architecture that satisfies LEED, BEPS, and tenant chargeback at once.

Topics covered

  • LEED v4.1 BD+C EA Prerequisite — building-level energy metering
  • LEED v4.1 Advanced Energy Metering credit — end-use coverage
  • BEPS overview: DC, NYC LL97, Boston BERDO, Denver, Washington State
  • Whole-building vs. end-use submetering scope decisions
  • Interval data, retention, and graphical reporting requirements
  • ENERGY STAR Portfolio Manager — data ingestion patterns
  • Emissions reporting — Scope 1 vs. Scope 2 from metered data
  • Accuracy classes: ANSI C12.20 Class 0.2/0.5 and IEC 61557-12
  • Commissioning and ongoing verification
  • Spec language and Division 25 coordination

Who it's for

  • LEED APs and sustainability consultants
  • Owners and asset managers facing BEPS penalties
  • MEP design engineers and commissioning authorities
  • ESG and compliance leads in commercial real estate

Standards & codes referenced

  • LEED v4.1 BD+C — EA Prerequisite & Credit
  • ASHRAE 90.1-2019 / 2022 — §8.4.3
  • ANSI C12.20 — Class 0.2 / 0.5 revenue metering
  • IEC 61557-12 — performance of measuring and monitoring devices
  • DC BEPS, NYC LL97, Boston BERDO, Denver Energize Denver
LEED v4.1 energy meteringBEPS compliancebuilding energy performance standardsadvanced energy metering creditLL97BERDOENERGY STAR Portfolio Manager

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LEED v4.1 & BEPS Compliance

Credits, prerequisites, and Building Energy Performance Standards reporting — the metering scope that satisfies both.

LEED v4.1 EADC BEPS · LL97 · BERDOENERGY STAR

Emergent Metering · emergentmetering.com

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