Have used these guy's on a number of… Have used these guy's on a number of occassions for new installs and repairs and found them to be reliable and tidy with their work. Easy to deal with and listen to what your requirements are to achieve a good result and very competitive prices.

Amazing work completed so quickly and… Amazing work completed so quickly and efficiently. They were very clean & tidy and got the job done in no time. Would 100% recommend.

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.

Diligent, Professional, Great Service! Sam, Jamie and all of the team at Crystal Sigma have been extremely supportive and helpful through the entire process until completion. We had a tricky grade listed building to get AC for so the planning, design and commissioning process has been full of hurdles but the team have been very diligent and navigating through. Thanks Guys!

I have team outstanding service 10/10 I have team outstanding service 10/10 In the following manner It was done within a strict time frame 2. The craftsman were very impressively efficient 3. They have done a tricky and neat installation which many other companies simply declined to undertake my work 4. My place was cleaned up with no mess at all 5. Last but not the least the price was very reasonable compared to alternative quotation I will recommend the company to any potential customers I have made this declaration out of goodwill in full honesty All the best Mohammed Furreedan