Zone the building properly
Activity, occupancy, conditioning and system differences affect how spaces are represented. A clear accommodation and services strategy avoids arbitrary modelling.
Non-domestic Part L
SBEM calculations and BRUKL reports
Non-domestic Part L modelling, with design feedback and final reporting based on the installed fabric and services.
When you need this work
Non-domestic energy compliance depends on geometry, activity areas, fabric, lighting, ventilation, heating, cooling, hot water and controls working as one model.
We establish the applicable route and model the building using the relevant National Calculation Methodology and approved software. Early assessment identifies which systems or zones are driving performance. At completion, the model is updated from verified as-built information before final reports are issued. More complex buildings or design questions may require dynamic simulation rather than, or in addition to, an SBEM route.
For certification on a sale, letting or completed building, see commercial EPC assessments.
What we check
Test coordinated options
Fabric, lighting efficacy, air permeability, ventilation, heat generation, cooling and controls interact. We show the project team which changes materially affect compliance.
Close the as-built model
Product substitutions, commissioning values and air-test results are incorporated only when evidenced. Outstanding information is tracked to a final schedule.
Common coordination issue
Room uses, conditioning and lighting zones must agree with the M&E design. Record landlord, tenant and shell-and-core assumptions so the model does not combine systems from incompatible design stages.
What you receive
Design-stage BRUKL report
The relevant compliance output for the modelled design and methodology.
Design action schedule
Missing information, assumptions and agreed performance requirements.
As-built reporting
Updated model and final BRUKL output where included in the commission.
Getting started
What we need
Architectural information
Plans, elevations, sections, site orientation, room uses, areas and glazing schedule.
Fabric and airtightness
Construction U-values, thermal-bridge approach, air-permeability target and final result where applicable.
Building services
HVAC, ventilation, hot water, lighting, controls and low-carbon technology specifications.
Before commissioning
Is SBEM used for houses?
No. SBEM is for relevant buildings other than dwellings. Dwellings use the applicable domestic methodology.
Does every non-domestic building use SBEM?
Not necessarily. Building type, complexity and purpose can indicate a dynamic-simulation route. We confirm the appropriate scope.
Can the model start before the M&E design is complete?
Yes, with clearly recorded assumptions. Early modelling can help set performance requirements for the developing services design.
Sources and further reading
Use the edition, jurisdiction and assessment route that apply to the project. Publication of newer guidance does not automatically change an existing project’s requirements.
Set the non-domestic compliance route early
Share the location, building use, floor area, stage and available architectural and M&E information.