Excellent workmen Excellent workmen; trouble with the office.

Highly recommended Crystal Sigma installed 2 air conditioner units in our house in London. We cannot be happier with their service and the final product. They were very easy to deal with, we had builders at home and they met with them and agreed on a plan to work together to install the units. Amazing job, thank you!

Excellent service from Crystal Sigma We have recently had 2 air conditioning units installed at home and we would recommend Crystal Sigma and their engineers to anyone looking to get an A/C installed in their home. Both of the engineers we had install our units were very friendly, professional, and knowledgeable. They worked efficiently and tidily and were able to answer all of our questions. A big thank you to James, David, and the rest of the Crystal Sigma team!

Recommendation I recommend Crystal Sigma

Excellent firm from start to finish Excellent firm from start to finish. The job wasn’t as straight forward as we would have wished but the guys at Crystal Sigma found us the right solutions to make it works. I found them to be professional and trustworthy and fair - I can’t recommend these guys enough for all your AC needs.