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The Challenge

York House is a five floor, multi tenanted office space which previously generated heat with natural gas. The building also has a 24-hour cooling demand and extended fresh air requirements.


The project to remove the carbon-intensive heating involved installing two air source heat pumps and a water-to-water heat pump to replace four gas boilers.

Once the system had been designed, there remained two major challenges with the project - the limited space for plant on the rooftop and installing the new heating system in a fully operational building.

York house

The Solution

The result is a 5-storey office building where gas has been completely removed to deliver more than 400,000-kilowatt hour reduction year on year in energy – all achieved in a central London retrofit project, where roof space for plant was at a premium.

The design of the solution was provided by the engineering design consultancy, 21 Engineering and the starting point was an advanced building model in line with the NABARS standard to identify what the actual peak load would be.

York House has a year-long cooling load and the Mitsubishi Electric four-pipe heat pump chillers mean that British Land can use some of the waste heat from that process to heat the building and help minimise energy consumption. The benefits to this for British Land were higher operational efficiencies, lower initial capital costs and a simpler installation.

York house 2

Products Used

i FX Q2 G05 2

i-FX-Q2-G05

Our flagship range for air sourced simultaneous heating and cooling (polyvalent / 4-pipe).

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EW HT Product Image Transparrant v4

EW-HT Water to Water Commercial Heat Pump

The Climaveneta EW-HT is perfect for applications where very high temperature water is needed.

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Customer Testimony

The project at York House is quite unique because it was our first building where we achieved a full gas removal by using heat pump technology. Our previous projects have been hybrid with gas being retained, but with this one we really wanted to lead by example as it’s our head office.

Matt Beales
Head of Technical Project Delivery,
British Land

View & download the full case study

York House- British Land Case Study