Excellence in Engineering


Low energy design is fundamental to all our design decisions. Crofton engineers are fully versed in the use of our building simulation software which forms the backbone of our design services.

Our engineers are CIBSE Low Carbon Energy Assessors who work closely with the design team to provide you with the most sustainable solutions for your project.

The building model is the basis of all our services. The model is set up in a three dimensional environment using plans, sections and elevations from your development. It provides a dynamic analysis of the building’s loads more accurately than a traditional static calculation; enabling maximum savings on both energy and client spend.

Our services in this area include:

  • BREEAM assessments - We provide BREEAM assessments for most building types as part of a packaged design solution thus assisting in providing a co-ordinated approach.

  • Bulk airflow simulation - This uses the building model to simulate dynamic air flow patterns, allowing an accurate representation of natural ventilation to the building. The outputs can also be used to determine the background ventilation to the building in accordance with Part F of the Building Regulations. The simulation is most useful in predicting ventilation rates in classrooms to ensure compliance with BB101 and BREEAM.

  • Carbon Emissions and Energy Use Analysis

  • Code for Sustainable Home assessments - Crofton provides C4SH assessments for residential buildings as part of a packaged design solution thus assisting in providing a co-ordinated approach.

  • Computational Fluid Dynamics (CFD) - A step on from the bulk air flow analysis, the CFD calculation uses the dynamic thermal simulation and provides a more detailed analysis of the air flow characteristics and temperature distribution within a specific zone at a specific time. Typically used in predicting air flow and temperature stratification in atrium.

  • Daylight assessments - Using the building model the daylight levels can be predicted and provide a more accurate output then a simple manual calculation. It is particularly useful when considering daylight levels in classrooms for BREEAM assessments and in residential properties for C4SH assessments.

  • Dynamic Thermal Simulation (DTS) / Thermal Modelling - This allows the building’s thermal performance to be evaluated over a period of time based on changing external and internal conditions and activities. It is a very powerful tool for optimising the thermal performance of a building, and the range of options and scenarios which can be simulated is vast. Employing the use of DTS at the earliest possible stages of a project produces great benefits to the design team.

  • Energy Performance Certificates (EPCs) and Domestic Energy Certificates (DECs) Non-domestic - Crofton provides EPCs for any non-domestic building within the UK – these are required for any non-domestic building when it is sold, rented, or constructed. In accordance with government guidelines, we do not use data collectors, and all surveys are undertaken by one of our CIBSE-accredited engineers.

  • Domestic - Crofton provides DECs for new-build or refurbished properties being sold, rented, constructed or refurbished. The production of domestic EPCs will require our accredited engineers to visit the property to ensure that the details used in the calculation are in accordance with the "as-built" condition.

  • Part L and Part F compliance - Independent advice can be provided on the building at any stage during the design or construction to ensure that all works are in accordance with the latest building regulations. It is recommended that both Part L (energy) and Part F (ventilation) are considered early on in the design process to avoid any potential issues at a later stage.

  • SAP Calculation

  • SBEM Calculations

  • Solar shading analysis - Solar shading, whether external or internal, helps to reduce solar heat gain to a space as well as reduce direct solar, or glare. However, too much solar shading will have a negative impact on the amount of natural daylight available to the space. Crofton’s experienced engineers can advise on the specific requirements for your project.

Want to know more?
Contact an engineer

01732 850440

020 7403 6879