Enfield
- LocationEnfield
- Completion DateFeb 2020
Kensa and ENGIE delivered England’s largest shared ground loop array heat pump programme replacing electric heating in Enfield Council tower blocks, all in under one year, with tenants remaining in their flats.
Eight tower blocks with a total of 400 flats in the London borough of Enfield had their inefficient electric underfloor heating replaced with What is a Ground Source Heat Pump?Ground Source Heat Pumps
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The award-winning district heating scheme saw a total of 100 boreholes drilled, ranging from 197-227m deep across the 2 sites. The boreholes were connected to the tower blocks via underground header pipes and riser pipework running through the stairwells providing a source of heat to 402 flats.
The tower blocks were previously heated by electrically powered underfloor heating which was powered directly from Enfield Council’s landlord supply. Tenants previously had no control over their heating which meant that they often had to open windows to try and control the temperature. With no metering provision tenants had to pay a fixed monthly fee to cover their heating regardless of how much heat they required. Therefore many tenants were pushed into fuel poverty with typical annual heat costs of £800-£1,100 per flat. This led Enfield Council to have major concerns about the health and wellbeing of their tenants.
Enfield Council comments:
This is an eco-friendly system that has enabled residents to save between £450-700 a year in heating costs at a time when household budgets are being squeezed. This project is good for residents and good for Enfield.
The latest readings suggest the flats are using less overall energy for heating and hot water than calculated. Electric consumption shows that heating bills are in the region of £200-£250, with the highest still only coming in at £450/year for a top-floor flat.
Dr. Matthew Trewhella, Director at Kensa, comments:
One of the great strengths of this system type is its flexibility and scalability. Shared ground loop systems can be featured in developments of just two properties (micro-district) whilst this project clearly demonstrates how the concept can be scaled up to much larger systems.
Simon Lacey, Regional Managing Director for ENGIE’s Places & Communities division, comments:
One of the key reasons this project has been a resounding success is that all parties have a shared vision which centres on improving lives, and we have worked collaboratively to achieve this goal for the residents of Enfield. We’re delighted to have been recognised for taking a proactive approach in tackling fuel poverty and hope to replicate this model across the country, so more people can live in sustainable homes without breaking the bank.
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