The 30th Scout Group in Colchester required a modern, energy-efficient headquarters to replace their outdated facility, which had exceeded its operational lifespan. The new Scout Hut was designed to be a low-carbon, high-performance community space, aligning with contemporary sustainability standards while ensuring long-term operational efficiency.
Energy Digest was engaged to conduct SBEM Calculations and Dynamic Simulation Modelling (DSM) to assess energy performance, carbon emissions, and regulatory compliance. Our analysis enabled an optimised design that balances energy efficiency, indoor comfort, and cost-effectiveness.
A structured energy strategy was implemented to enhance sustainability and regulatory compliance.
Advanced Building Fabric Design
The Scout Hut was constructed with exceptionally low U-values, particularly in the roof and floor, significantly exceeding regulatory standards. This enhanced insulation reduces heat loss, improving long-term efficiency.
High-Efficiency Air Source Heat Pump (ASHP)
The primary heating system utilises an underfloor heating network, designed with an optimal screed thickness to balance rapid heat-up times and thermal retention, ensuring consistent warmth while minimising energy demand.
Passive Cooling & Natural Ventilation
Well-placed, operable windows enable effective cross-ventilation, maintaining indoor air quality and reducing reliance on mechanical cooling. The location’s low external pollution levels allowed for a natural ventilation strategy, aligning with sustainability goals.
Water Efficiency Measures
To reduce domestic hot water energy demand, low-flow showers and water-saving fixtures were installed. This simple yet impactful measure lowers operational costs while contributing to an overall reduction in energy consumption.
Although the project posed few significant difficulties, one area of concern emerged around the increased energy consumption needed to heat hot water for a proposed shower. To address this, the team recommended:
Installing an aerator
Aerators are components you can install in a shower hose or tap to slow the flow of water thus reducing water usage. In this instance the team successfully reduced shower water usage to below 7 liters per minute.
This straightforward adjustment had a substantial impact on lowering energy consumption relative to the minimal cost of purchasing an aerator.
Through detailed analysis and expert energy modelling, Energy Digest successfully delivered:
Full Compliance ensuring a high level of energy efficiency with Approved Document L Volume 2
Significant Carbon Reduction, achieved by incorporating Low Zero Carbon (LZC) technologies and optimising energy use intensity
Optimised EPC Performance, with a predicted A-rated EPC, demonstrating best-in-class energy efficiency.
