New Release of iSBEM 6.1

iSBEM (v6.1.b) has been released. Energy assessors will need to start using this new version from 15th June 2022.

Download the new release here: UK NCM: Download SBEM

Primarily, iSBEM_v6.1.b implements some minor changes to the compliance requirements for building services in England, as published by the Department for Levelling Up, Housing and Communities (DLUHC) in the 25th February revisions to the 2021 ADL2 document (which is also due to come into force on 15th June 2022).

What’s Changing?

The main change likely to impact Part L calculations and EPCs, between the previous version of iSBEM and the current version, is that carbon intensity factors have been updated. This change reflects the general decarbonisation of grid-supplied electricity that we have seen over the past decade or so.

This will have the biggest impact on electricity, which is changing from being (in the region of) twice as bad as gas to slightly better than gas. The actual figure for electricity will be changed from 0.519 to 0.139. In comparison, gas will be changed from 0.216 to 0.210.

This means that going forward, buildings that have electric HVAC and Hot Water systems will be looked on more favourably by the software. They are also likely to show an improvement in the EPC rating when compared to ratings produced using version 5.6 or previous.

Minimum Energy Efficiency Standards (MEES)

If you are working in the MEES sector, it may be worth reviewing previous EPCs lodged with your MEES clients to see what rating would be achieved in the new software – especially with buildings where the primary heating/hot water fuel is electricity. You should also consider the recommendations you are generating in the build-up to the changeover date of the software, making sure your clients are educated on what the software change could mean for current and future EPCs.

Building Foundation Area

One other notable change is the addition of an entry for building foundation area. This field is only available when completing a project where the purpose of analysis has been set to England Building Regulations Part L 2021, e.g. when creating a BRUKL report.

The correct way to calculate the building foundation area is to divide the total conditioned floor area by the number of floors for the building being assessed.

This figure is then used by the notional building in order to allocate the correct amount of PV the notional building assumes.

Get In Touch

If you have any questions regarding this, please contact our Non-Domestic technical support team on:

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