The system performs calculations on the data that you report for each fuel type to determine your total energy consumption and track your performance.

TFC & TPER explained

Your organisation's energy consumption can be expressed as total final consumption (TFC) or total primary energy requirement (TPER). You enter data into the M&R system in TFC but the system tracks your performance using an EnPI based on TPER.

Total final consumption (TFC)

TFC is the energy consumption recorded on meters and and bills.

Total primary energy requirement (TPER)

TPER is a measure of your energy consumption that also accounts for the energy that is consumed and/or lost beyond the boundary of your organisation, notably in generating and distributing the electricity that you use.

Why M&R uses TPER

A more complete measure of energy use

TPER gives a more complete measure than total final consumption of the impact of the individual public body and the public sector as a whole on energy use and on energy-related CO2 emissions.

Aligned with policy & legislation

The targets set out in national and European policy and legislation are in primary energy.

Gives organisations credit

TPER implicitly gives organisations credit for reducing electricity system losses for ‘Ireland Inc.’ when they implement certain onsite electricity generation systems, e.g. CHP, auto-generating wind turbines, on-site solar PV.

Aligned to the relative costs & environmental impact of energy types

TPER accounts for the inherent higher value of electricity compared to other energy types and it is more closely aligned to the relative costs and environmental impact of electricity compared to other energy types.

For example, 1 kWh TFC of electricity typically costs over three times more than 1 kWh TFC of natural gas. In TFC terms, both are counted as 1 kWh. However, in TPER terms the 1 kWh of electricity is counted as 1.96 kWh and the 1 kWh of natural gas is counted as 1.1 kWh (based on 2018 conversion factors).