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Leyton Orient – Case Study


We were instructed to complete an energy review on three of the four high quality residential buildings situated around the historic football ground of Leyton Orient FC.


Challenges faced

Following our initial site visit, we identified that the landlord’s electricity supply usage for one of the buildings was considerably higher than that of the similar sized buildings. This warranted further investigation and it was agreed that we would return to site to inspect the issue further.


Our solution

As a starting point, our engineer installed a three-phase data logger onto the supply in order to measure the flow of electricity going into the meter. This enabled us to ensure that the correct consumption was being recorded. Two weeks into the survey we returned to site to download the data and the results concluded that the meter was in fact logging the correct consumption.

To ensure the issue was resolved, we completed a full site audit and undertook a detailed survey on the parts which were supplied by the landlord’s electricity. It was discovered that the car park shutter doors were open and that the lights were on constantly without any presence detected inside the car park.

The PIR (presence infrared sensor) at the entrance of the car park was being triggered by passing pedestrians, turning the lights on. We subsequently removed the PIR and restarted the data logger so we could compare before and after data.

Results concluded that the removal of the PIR reduced the overall consumption of the landlord’s supply. We compiled a consumption report to the client and recommended that the car park entrance required a replacement PIR with a more effective angle of motion detection and adjustable off delay time function.