About Diffusion

With over 50 years in the H&V industry Diffusion is one of the oldest most established manufactures of Heating Ventilation and Air Conditioning products in the UK.

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. Operating to all relevant BS quality standards Diffusion has an ongoing continuous improvement programme aimed at improving every aspect of the business.

Over many years Diffusion has been involved with many challenging and prestigious projects across a spectrum of sectors including hotels, commercial offices, retail, schools, hospitals, residential and so on. click here to view some of our case studies

During this time Diffusion has established excellent working relationships with many blue chip clients including, Land Securities, Marks & Spencer, Boots, City Inn Hotels, Stanhope Properties and many more.

TruLaser 2030 Automated Laser Cutter

TruLaser 2030 Automated Laser Cutter in Diffusion’s West Molesey manufacturing facility

All products offered by Diffusion Heating & Cooling are designed, developed and manufactured at its 30,000 sq ft factory in West Molesey, Surrey, offering the best possible product, designed specifically to meet the customers bespoke requirements.

Our investment in dedicated R+D and Test facilities lets us supply accurate air volume, thermal and acoustic performance data for everything we manufacture.

Our facilities let us accurately simulate real-world operating conditions and configurations, so you can have complete confidence in the performance of your Diffusion units, no matter how demanding their intended environment.

Whether you are looking for fan coil units, air handling units for an office block, or over door heaters for a retail outlet, Diffusion Heating & Cooling has the experience and range of products to offer a creative, dependable solution to satisfy your requirements.

Diffusion is looking forward to the next 50 years and hopefully serving your requirements.

Diffusion is the recipient of H&V News award 2003 and the H&V News “Product of the Year” award 2007.

The company operates under ISO 9001/2008 and ISO 14001:2004. Click here for Certificates

Design is linked to manufacture via CAD/CAM systems which allows development of new products to be completed in an effective and timely manner.

All Diffusion products are tested in our in-house independently calibrated test rooms, where we can test air volume, thermal and acoustics as well as independently by industry recognised professionals.