Diffusion is a British manufacturer with an enviable reputation built over 60 years in designing standard and bespoke fan coil units that serve the needs of countless businesses across the construction supply chain. We pride ourselves on having close relationships with everyone involved in the Heating Ventilating and Air Conditioning industry.

Diffusion has built up a wealth of experience that can only be achieved with time. The business has a very experienced and loyal workforce many of whom have in excess of 20 years service with the company and even more in the industry.

Diffusion has been involved with many challenging and prestigious projects across a spectrum of sectors including hotels, commercial offices, retail, schools, hospitals, residential and more. Countless landmark buildings benefit from the thermal comfort gained by Diffusion products. These include The Shard, Southwark's stunning skyscraper, the iconic Walkie-Talkie building and the spectacular 41 story building, One Bishopsgate Plaza. Consultants and Specifiers in the HVAC industry have come to rely on Diffusion products thanks to our inhouse design, technical and testing capabilities that enable our customers to come and see our products being Witness Tested on-site in Surrey. This year we have designed and launched a new range of innovative fan coil products, visit our website or give our team a call and let us demonstrate the many merits of our fan coils to you project. Build your project on Trust.