SBEM Calculations: What are they?
SBEM (Simplified Building Energy Model) calculations assess the energy performance of non-residential buildings in the UK, they are often also termed Building Regulations UK Part L (BRUKL) calculations.
These calculations ensure compliance with Building Regulations and contribute to creating energy-efficient buildings. This article will explore SBEM calculations, why they are necessary, and how they are carried out.
SBEM calculations evaluate the energy performance of commercial buildings. They consider several factors, including the building's fabric, heating, cooling, ventilation, hot water systems, and lighting. The primary goal is to ensure that the Building Emission Rate (BER) does not exceed the Target Emission Rate (TER), thereby meeting the Building Regulations Part L2 standards.
SBEM calculations are crucial for several reasons:
Regulatory Compliance: They help show compliance with Building Regulations in England, Wales, Scotland, and Northern Ireland.
Energy Performance Certificates (EPCs): These calculations are necessary to produce EPCs, which rate a building's energy efficiency. It should be noted that buildings completed in an SBEM engine are Level 3 and 4 EPCs, and those completed in Dynamic Simulation are Level 5 EPCs.
Sustainability: SBEM calculations help reduce carbon emissions and promote sustainable building practices by identifying areas where energy efficiency can be improved.
SBEM calculations are performed at two key stages: the design stage and the as-built stage. Here's a brief overview of the process:
Design Stage: During this phase, the calculations are based on the proposed design of the building. This helps identify potential issues early on and allows for adjustments before construction begins.
As-Built Stage: The calculations are updated to reflect the actual building specifications after construction. This ensures that the building meets the required energy performance standards.
Several elements are reviewed during SBEM calculations to ensure compliance with Building Regulations:
Building Fabric: The materials and construction methods used for walls, floors, and roofs.
Heating and Cooling Systems: The efficiency of heating, ventilation, and air conditioning (HVAC) systems.
Hot Water Systems: The efficiency of hot water generation and distribution.
Lighting: The type and efficiency of lighting systems used in the building.
Renewable Technologies: The integration of renewable energy sources, such as solar panels or heat pumps.
When completing calculations for new buildings, the term SBEM is often used interchangeably with calculations performed within a Dynamic Simulation package such as IES.
SBEM calculations ensure that commercial buildings are energy efficient and compliant with regulations. By understanding these calculations, building owners and developers can contribute to a more sustainable future while also meeting legal requirements.
For more information on SBEM calculations, feel free to contact our team at KJ Tait.