We had Abdel and Imran come from Crystal sigma to fix our broken AC units. Not only did they fix them but the service they provided was amazing, everything question we had they explained kindly and p... See more
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We’ve had a contract for 3 years now. The most disorganised and irritating business… arrived unannounced to service the aircon 3 months early and then chasing 30 day invoice payment from the next day,... See more
Company replied
Our ac was broken after they explained what was wrong they cleaned them and they started working without any issues. We’ll make sure to call back for any kind of issues. Very friendly engineers Imran... See more
Samir came up with the ideal solution for my house and Vali and his team did an impeccable job with the install. We were concerned as our house was recently renovated and AC was an afterthought,... See more
Company details
Information provided by various external sources
Cambridge air conditioning Company, air conditioning in Cambridge. Crystal Sigma is air conditioning and Refrigeration Company in London for both domestic and commercial sectors.
Contact info
United Kingdom
- crystalsigma.com
4.4
Excellent
92 reviews
No recent history of asking for reviews
This company hasn't invited customers recently, so reviews may not be representative
Replied to 100% of negative reviews
Typically replies within 24 hours
How this company uses Trustpilot
See how their reviews and ratings are sourced, scored, and moderated.
Reliable Company
Very reliable company. Helped us with emergency situation and got everything done fairly quickly.
23 February 2021
Excellent service very prompt and…
Excellent service very prompt and professional
8 February 2021
Unprompted review
I have been using Crystal Sigma for…
I have been using Crystal Sigma for several years and i highly recommend them.
They are very professional and they get the job done on time and budget.
Highly recommended.
Nader Harb
5 February 2021
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!
5 February 2021
I had a good experience
I had a good experience. I could reach them quickly when I had issues
5 February 2021
Excellent service form start to finish
Excellent service form start to finish! True professionals!!!!
I will recommend to friends and family.
4 February 2021
Excellent and very prompt service,very…
Excellent and very prompt service,very helpful office and service people.
4 February 2021
The service is very satisfactory
The service is very satisfactory , finishing the job on time is not
4 February 2021
Very helpful
Very helpful, attended same day & completed works in professional manor.
3 February 2021
Unprompted review
Excellent service
3 February 2021
We highly recommend Crystal sigma
We highly recommend Crystal sigma. They service our 4 AC units and we are very happy with them.
Drury Porter Eyecare
3 February 2021
Professional team.
3 February 2021
Brilliant service everytime
3 February 2021
Very accommodating and reasonably…
Very accommodating and reasonably priced. There was good communication througout the project, we used them twice so far. Very good
1 February 2021
Unprompted review
I would highly recommend
I would highly highly recommend, excellent prices, professional installers and very clean work,
even due to this pandemic products dispatched on time and arranged everything,
10/10
30 January 2021
Professional Service
30 January 2021
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