Celebrating Pimlico District Heating Unit

By District Energy posted 06-18-2020 10:18


City of Westminster


Westminster is celebrating its long-serving, low-carbon, local heat supply.

Pimlico District Heating Unit (PDHU) has been supplying affordable and sustainable energy to residents for nearly 70 years.

The PDHU was developed and built in the post-war period to help address poor air quality in Central London. It was formalised in the autumn of 1951 and is the oldest district heating scheme in the UK, as well as the largest in London.

Originally, the PDHU made use of waste heat from the nearby Battersea Power Station. The heat was pumped through a tunnel under the Thames and was distributed to the homes within the district.

As the power station has modernised, so too has the PDHU. It now produces heat using combined heat and power engines and boilers located in the ‘Pump House’ situated in Churchill Gardens. This system is a low-carbon source of heat, allowing the PDHU to produce a combination of electricity, which is utilised by the National Grid, and heat for Pimlico. The sale of the electricity to the National Grid helps offset the costs to residents, increasing the savings they make by using the scheme.

This is a more efficient manner of producing energy than can be achieved by conventional boilers and power stations.

The PDHU has a large reach with an almost 5km underground network of pipes transporting heat to over 3,250 homes, 50 commercial premises, 4 schools, and a Post Office.

District heating schemes are sustainable methods of producing and distributing energy, and the PDHU alone saves over 8,000 tonnes of carbon a year compared to traditional methods. Residents also benefit from savings as there is no requirement for a wall-boiler in properties supplied by the schemes.

Cllr David Harvey, Westminster City Council Cabinet Member for Housing Services said:

“I am proud to say that here in Westminster we have the oldest district heating scheme in the UK. These schemes enable our residents to get the affordable heat they need for their homes, whilst also making a relatively small impact on the environment.

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