BEE PAT and ECSBC: measured energy for plants and buildings
India's Bureau of Energy Efficiency runs PAT, which sets specific energy consumption targets for energy-intensive plants, and the building code now called ECSBC 2024. Both turn on metered energy. Aqueduct supplies it per plant, process and building.
Who it applies to
PAT covers designated consumers notified under the Energy Conservation Act, 2001: energy-intensive plants in sectors such as cement, iron and steel, aluminium, fertilizer, textiles, pulp and paper and thermal power, plus hotels using 500 tonnes of oil equivalent or more a year from Cycle V. They appoint an energy manager, file annual energy returns and carry out mandatory audits.
The building code applies to commercial buildings with a connected load of 100 kW or contract demand of 120 kVA or more. ECSBC 2024 replaced ECBC 2017; its base level is mandatory where states adopt it, and Plus and Super levels are voluntary.
What each scheme requires, and the data behind it
Clause numbers refer to the ECSBC 2024 text published by BEE. Accredited energy auditors verify PAT results.
| Requirement | What it asks for | Data Aqueduct supplies |
|---|---|---|
| PAT, specific energy consumption | Energy per unit of product against a notified baseline and target. | Energy per process line and production count on one timeline. |
| PAT, ESCerts | Savings beyond target earn certificates; a shortfall is met by buying them. | Monthly progress against the target, so the position is known before verification. |
| ECSBC 8.2.5, check-metering | Building mains logging kWh, kVARh, kVAh, kW or kVA and THD half hourly; smaller services logging energy and demand. | Multi-function meters read at 15 minute or half hour intervals. |
| ECSBC Table 8.2, sub-metering | Separate metering for major end uses as the table sets out. | Sub-meters per HVAC, lighting and plant load, mapped by floor and zone. |
| ECSBC 9.2.6, water metering | Meters on all supply lines entering the premises and supplying the building; IoT smart meters allowed. | Inlet and building supply meters in a live water balance. |
Scale and what comes next
Energy-intensive industries covered by PAT, using 55% of industrial energy, with 25.78 Mtoe saved.
Source: Bureau of Energy EfficiencyUnder the Carbon Credit Trading Scheme, which PAT sectors will move to gradually on emission intensity targets.
Source: BEE: Carbon MarketApproximate savings over a conventional building at the code's base, Plus and Super levels, as BEE set them for ECBC 2017.
Source: BEE: ECSBC CommercialRelated standards
sites in 21 countries run on Aqueduct.
and 9 clinics in one of India’s top hospital chains.
US airport running water intelligence on Aqueduct.
of commercial real estate under Aqueduct.
FMCG manufacturing campus.
operations run on Aqueduct.
Related
Common questions
BEE says PAT will move gradually to the compliance mechanism of the Carbon Credit Trading Scheme, which sets greenhouse gas intensity targets per unit of output. Plants still need metered energy and production data, now converted to emissions.
Specific energy consumption is a ratio. A plant that meters energy well but records output loosely cannot show its true intensity, so Aqueduct puts both on one timeline.
ECSBC is written for new commercial buildings and major additions, not for existing stock. Many owners still use its metering clauses as the reference when upgrading, and Aqueduct supplies the half hourly mains and end-use data those clauses describe.
An Energy Saving Certificate is issued to a designated consumer that beats its specific energy consumption target, and a plant that falls short buys them. Aqueduct tracks energy per unit of output monthly, so the plant knows its likely position before the accredited auditor verifies the cycle.
See Aqueduct on your own facility.
Bring a site, a utility bill or a question. We will show you where the loss is.