BRUKL Reports

BRUKL Reports (Building Regulations Part L)

Reports and SBEM Calculations


We can quickly produce SBEM Reports (also know as BRUKL or Part L Reports) for partially completed, new or extended commercial building from your architects drawings and M&E specifications. Our reports can be upgraded in the future to a lodged Commercial EPC upon completion of the building (with a site visit to verify our data) for a proportional additional cost.

Building Regulations L2A  apply to non-domestic new buildings.

SBEM, or Simplified Building Energy Model, provides an analysis of the predicted energy performance of a building and are required by Building Regulations to comply with the Part L section of the regulations.

Building Regulations L2B apply to non-domestic refurbishment, extensions, renovations.

SBEM calculations will be required by Building Control for area of over 1000 m2 and more than 25% of the floor area (are not required for the exiting portion of the building). SBEM calculations for conversion projects are different however.  The SBEM report needs to show that the thermal elements such as walls, floors and glazing have been updated to minimum standards.

The SBEM calculations produce an SBEM report certificate which shows the SBEM rating for the building in question.  If the SBEM report certificate shows a pass then the project passes Part L of the Building Regulations.  SBEM calculations and the requirements of the SBEM report vary between new build, extension and conversion projects.

THE PROCESS - The first part of the SBEM calculations involves the assessor working out a Target Emissions Rate (TER) for the building using drawings and building specification information. The next step is the calculation of the Building Emission Rate (BER). If this is equal to or less than the TER then the SBEM report shows a pass and the SBEM calculations are complete. The SBEM report will then be sent to the client, either electronically and/or as a paper copy, to be passed on to Building Control.  If the BER is not equal to or less that the TER then the SBEM assessor will liaise with the client and suggest changes that will aim to improve the BER to a level that the SBEM calculations show a pass.

To produce an SBEM Report we need the following information, if any info is not provided then the default values will be used for that particular module which will usually result in a reduced overall score.

Only provide the information specified below, providing irrelevant or non-specific info will delay the delivery of the final report.

  1. 1. Internal Lighting Power Density (W/m2) = typically less than 5.0
    2. Building permeability – infiltration rate (m3/hr-m2) = between 2.0 and 5.0 for new buildings
    3. U-Values for:
    i. Ground floor
    ii. Separating floors/ceiling
    iii. External Wall
    iv. Internal Wall
    v. External glazing
    vi. Exterior doors
    vii. Roof (flat and pitched)

    4. Pdf or image (jpg, png etc) of floor plans. The drawings must be in proportion and reflect the true shapes of the rooms – i.e. a rectangular room should not be represented as a square! There must be at least two INTERNAL dimensions shown on the drawing. It doesn’t matter if these are hand drawn on the original plans and then scanned and emailed.
    5. Conceptual/actual external elevations
    6. Hot water system (e.g. wall mounted instant hot water heaters/point of use, same as central heating with 170 litre copper cylinder etc)
    7. Central Heating specification (e.g. Gas Combi with rads, AirCon Split System etc).
    8. Make and model of boilers, AC units, heat pumps etc.
    9. Solar PV and/or Solar Hot Water system info – kWp, storage capacity, HW details.
    10. Overall description of the building – e.g. Workshop built in 2017, cavity brick block (insulated) with 15’ pitched metal clad rood

All new buildings, including extensions, which are greater than 500m² will require an Air Leakage Test upon completion