Welcome to Crystal Sigma

Crystal Sigma is a leading specialist in refrigeration, ventilation, heating and electrical services, air conditioning Essex, London, for the home and the business place.

We have offices based in London, Oxford, Essex and Cambridge, and our services cover all of Greater London, Oxfordshire, Cambridgeshire, Hertfordshire and Buckinghamshire. For more information on the areas covered by our air conditioning engineers, please visit our coverage section.

Our highly qualified engineers guarantee a professional and reliable service, and we specialise in being flexible and responsive to your needs.

Let Crystal Sigma inject a breath of fresh air into your space – contact us today for a free quote and consultation.

Read the latest legislation on CFC and HFC phase-out.