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. When the building is complete our reports can be converted to a lodged Commercial EPC.

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.

(A) The BRUKL report will only use values/information provided. Where information is not provided (including substituting info with references to Part L2 Minimum Standards), software defaults will be used.

(B) Work will not begin on the report until all the information necessary has been provided.

(C) Commercial EPCs cannot be lodged until the building contains a HVAC system.

(D) Draft Commercial EPCs (unlodged) can be created at design stage.

Please note, absence of items 1,3,7,8 will likely lead to a FAIL score against current building regulation requirements. Item 4 is essential.

Only provide the specific information requested below.

  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 (all new buildings, including extensions and renovations, which are greater than 500m2 will require a building permeability air test!)
  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)

  1. 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.
  2. Conceptual/actual external elevations
  3. Hot water system (e.g. wall mounted instant hot water heaters/point of use, same as central heating with 170 litre copper cylinder etc)
  4. Central Heating specification (e.g. Gas Combi with rads, Aircon Split System etc).
  5. Make and model of boilers, AC units, heat pumps etc.
  6. Solar PV and/or Solar Hot Water system info – kWp, storage capacity, HW details.
  7. Overall description of the building – e.g. Workshop built in 2017, cavity brick block (insulated) with 15’ pitched metal clad rood

To convert the report into an EPC I require a statement (email is fine) confirming that the building has been completed as per the original design, plus photographs of:

  1. Front, rear and side elevations (external)
  2. Typical Boiler/AC unit (i.e. not every AC unit/radiator in the building!!)
  3. Typical window, showing cavity
  4. Kitchen zone
  5. 1 x WC zone
  6. 1 x Workshop zone
  7. 1 x Office zone
  8. 1 x Lobby/Entrance
  9. 1 x Corridor