In a House of Commons debate secured by Andrew Selous MP, Members of Parliament have encouraged ministers to take further action on diesel-powered transport refrigeration units.

Mr Selous, MP for South West Bedfordshire, led Wednesday’s hour-long debate on ultra-low emission vehicles, and said it was a vital issue to help tackle climate change, create new industries, respond to the challenges of energy security, and help reduce the cost of driving.

He also called on ministers to tackle highly polluting and unregulated transport refrigeration units (TRUs).

The growing calls for tighter regulation of TRUs mean the industry needs to prepare. This leaves Dearman well-placed to deliver, with the company having developed a zero emission TRU which is currently undergoing advanced road trials.

Dearman’s novel piston engine uses the expansion of either liquid air or liquid nitrogen to provide zero-emission power and cooling. The only emission is air or nitrogen, with no emissions of nitrogen oxide, carbon dioxide or particulate matter.

Conventional diesel transport refrigeration systems are lightly regulated and can emit up to 29 times as much particulate matter and six times as much NOx as a modern truck engine. Britain’s 84,000 TRUs becoming zero-emission would equate to taking 5.5 million Euro6 diesel cars off our roads.

Andrew Selous MP said:

“There are, I understand, estimated to be 84,000 transport refrigeration units powered by highly polluting diesel engines that are not yet regulated. That is a significant omission in the urgent battle that the Government need to fight to significantly improve the United Kingdom’s air quality. What action will the Government take on transport refrigeration units?”

Commenting on the debate, Dearman’s Deputy Chief Executive, Michael Ayres, said:

“As shown during the House of Commons debate, there are growing calls for tighter regulation of transport refrigeration units, and this means the industry needs to start preparing. This is where Dearman can help. We have developed a patented zero-emission engine, currently undergoing advanced road trials, which would significantly cut emissions compared to polluting diesel engines.

“We look forward to continuing our work with local authorities and businesses who want to reduce their emissions. The impact of adopting zero-emission TRUs would be huge. As Mr Selous rightly pointed out, if Britain’s 84,000 TRUs became zero-emission, that would equate to taking 5.5 million Euro6 diesel cars off our roads, or 505,000 Euro6 trucks.

“Ministers are taking the right steps to improve Britain’s air quality, such as through the proposed Clean Air Zones, and Dearman look forward to showing the clear potential of our technology to help meet this vital objective.”


For further information please contact:

Mo Saqib (Policy & Communications Officer, Dearman Engine Company)
T: +44 (0)203 829 0035 E: mo.saqib@dearman.co.uk