Background

Travis Perkins wished to commission a “model” design on which their future branches would be based.

ESP, as their appointed services consultants was engaged to review the way in which their branches were serviced and to investigate proposals for improving energy efficiency.

The resulting services schemes were modelled for Building Regulations Approved Document Part L2A compliance using iSBEM and further enhancements made in order to achieve the target C0₂ emission requirements.

Description

The model building comprised a ground floor sales area with associated manager’s office and a ground floor warehouse area. There is also a mezzanine level warehouse area with an adjacent ablutions block.

The entire facility is provided with artificial lighting and the sales area, office and staff areas are provided with environmental control systems comprising heat pumps and some minor electric heating.

Findings

When initially modeled, the building failed to comply with the target CO₂ emissions required for Part L2A compliance.

From an analysis of the output data, it was clear that the energy consumed by the electric lighting installations was the largest culprit for the failing.

ESP implemented a number of changes to the electric lighting installations, including;

• A 25% reduction in lighting energy consumption for the sales area by optimising the design solution.
• The addition of photoelectric daylight control switching to the warehouse lighting installations.
• The introduction of energy monitoring and targeting systems to the lighting installations.

Following implementation of the above changes the building achieved the required C0₂ emissions target.

These improvements have now been included within the standard specifications for the future Travis Perkins branches.