Stroma Built Environment provides Simplified Building Energy Model (SBEM) calculations and Dynamic Simulation Modelling (DSM) for non-domestic buildings.

Our team of highly skilled Energy Assessors are experienced in carrying out SBEM calculations and DSM modelling across a wide variety of buildings, including schools, healthcare buildings, offices, and retail units, as well as other commercial buildings.

We have years of experience providing clients with a professional service with rapid and accurate reporting that ensures compliance with Part L2a of the Building Regulations and a smooth handover process.

What are SBEM Calculations?

SBEM calculations are a series of regulatory energy predictions carried out to demonstrate compliance with Part L2a of the Building Regulations. They are a mandatory requirement for new build commercial properties, as well as conversions and large extensions.

The information they provide allows us to accurately assess the energy performance of a building by calculating details such as CO2 emissions and total energy consumption. This generates an Energy Performance Certificate (EPC), enabling designers to ensure their projects meet current requirements from the outset.

Client Planning Meeting

Benefits include: 

  • Enables designers to quickly assess the best solutions for each project.
  • Minimises the time and cost associated with the compliance process.
  • Helps achieve BREEAM credits.
  • Increases the potential for funding, grants, and incentives.
  • Cost-effective way to help you meet sustainability goals.

What is Dynamic Simulation Modelling?

DSM is a powerful virtual tool that can be used to carry out simulations to accurately predict and measure the energy performance of a building. It offers a greater level of detail than an SBEM as it also factors in external information like real-time data, historical weather figures, and sun path analysis.

DSM models also enable designers to develop and test energy-saving strategies like alternative lighting systems or renewable energy sources. By understanding how a building works and its energy needs, we can support businesses to use resources efficiently while reducing energy consumption, improving sustainability, and ensuring regulatory compliance.

3D Thermal Modelling Software

Using industry-leading 3D DSM and IES Virtual Environment software, we can create a detailed thermal model of your proposed development to assess its environmental performance when built.

DSM covers various aspects of a building’s energy efficiency, including:

  • Energy usage and CO2 emissions
  • Building geometry, location, and orientation
  • Thermal performance and overheating (U-Values/Air Tightness)
  • Daylight/Sunlight Analysis
  • Renewable Technology Feasibility
  • Building Services (HVAC systems)
  • Lighting and controls
a city view from a window

When do you need an SBEM Assessment?

An SBEM assessment is needed pre- and post-construction.

We offer a range of SBEM calculations, including:

Design Stage SBEM Calculations

Design Stage SBEM Calculations

Design Stage SBEM calculations are a legal requirement and must be completed before construction begins. Additionally, they must also have been validated by an accredited Energy Assessor before the completion or occupation of construction works.

As-Built SBEM Calculations

As-Built SBEM Calculations

On completion of the construction phase, As-Built SBEM calculations are required to ensure the building is still fully compliant with Part L2a of the Building Regulations.

SBEM for Existing Buildings

SBEM for Existing Buildings

For existing buildings, SBEM calculations may be required to demonstrate compliance with Minimum Energy Efficiency Standards (MEES) legislation. They assess the energy performance of a building in its current condition to determine if it meets MEES requirements.

It must be validated by an accredited Energy Assessor and an EPC will be produced, which includes the calculated energy performance rating. It is also important to note that it must be completed before the building can be let or sold.

What is the difference between SAP and SBEM?

SAP and SBEM are two different predictive energy modelling tools used in the built environment.

SAP is typically used to assess the energy efficiency of existing buildings and dwellings, while SBEM is used to determine the energy efficiency of new or proposed buildings and dwellings.

SAP is based on a regional average for the energy performance of a building, while SBEM considers more specific parameters like building age and type.

Both methods are used by Building Control Officers when assessing building regulations compliance.

In the UK, all new dwellings must be assessed using SBEM calculations, while existing buildings can use either SAP or SBEM.

energy performance chart

Click to find out more about SAP calculations