Is this your business? Claim this free listing to add your details, photos and start making it easier for homeowners to contact you directly.
Claim this listingThis listing is unclaimed, so its contact details are not published here. The directory is not accepting quote requests for this listing.
Compare other installers£7,500
BUS grant amount
About Crystal Sigma Ltd
Crystal Sigma Ltd is a air source and exhaust air heat pump installer based in London, Greater London. MCS number NIC-3433 is on record; check its current status before booking. It is one of 114 installer listings in Greater London, and one of 85 recorded as registered for the Boiler Upgrade Scheme. Confirm current registration with Ofgem before relying on the grant. Homeowners rate it 4.7 out of 5 from 36 Google reviews. It covers Northern Ireland.
How Crystal Sigma Ltd compares in Greater London
114
Installer listings in Greater London
85 registered for BUS
This installer is one of them
#34 of 78
by Google review count among reviewed installers
Other installer listings in and around London
- Octopus Energy Services Limited · London4.7 (7476)BUS
- 4.9 (537)BUS
- On Point Plumbing Ltd · London5.0 (187)BUS
- Heat Geek Installations Limited · London4.7 (142)BUS
- Jayesh Kanbi t/a a Rated · London5.0 (127)BUS
Business details
Coverage area
Based in n/a, NW27AY
Areas served:
Reviews
4.7
36 Google reviews
Based on verified Google reviews
We recently had an engineer named Imran from Crystal Sigma come out to service our air conditioning unit, and we could not be happier with the experience. Imran was an exceptional engineer. He took the time to clearly explain the issues with the unit so we understood exactly what was going on.Thanks to his expertise, the air conditioning is now working perfectly. Our customer is absolutely delighted with his service and gave us fantastic feedback about their experience. We highly recommend Crystal Sigma for their professionalism and top tier service. Thanks you from team at finsbury park Costa
We had 2 twin units installed in one of our Colleges, the service from start to finish from Crystal Sigma was impeccable, they were transparent throughout the install, the quality of the work is second to none. Thank You for your service.
Extremely professional and responsive with very high standards, from Jamie’s planning and advice through to the installation. Great system and great guys. I’m very grateful after a disastrous experience with a competitor that shall not be named. It is so refreshing when things are done properly.
SIGMA
Brilliant service - every friendly, great at trouble shooting to make sure everything was done in the best possible way, and even sorted out some minor redecoration needed. Very happy customer!
Showing the 5 most recent of 36. Reviews from Google. Read them on Google
Frequently asked questions
How can I check Crystal Sigma Ltd's MCS certification?
Our record lists MCS number NIC-3433. Check the current status and the heat pump technology covered on the official MCS installer register before agreeing work.
Can Crystal Sigma Ltd claim the Boiler Upgrade Scheme grant for me?
Yes. Crystal Sigma Ltd is registered with Ofgem for the Boiler Upgrade Scheme, so it can apply on your behalf and take the grant off your quote. You do not apply yourself. 85 of the 114 installers listed in Greater London are registered.
What types of heat pump does Crystal Sigma Ltd install?
Crystal Sigma Ltd installs air source and exhaust air heat pumps. Air source is the most common choice for UK homes because it needs only an outdoor unit and no groundworks.
Which areas does Crystal Sigma Ltd cover?
Crystal Sigma Ltd lists Northern Ireland as its coverage area. Most installers will travel 25 to 50 miles from base, so it is worth asking if you are just outside.
How is Crystal Sigma Ltd rated?
Crystal Sigma Ltd has a 4.7 out of 5 rating from 36 Google reviews, which makes it the 34th most-reviewed of the 78 installers in Greater London with reviews. Read the most recent reviews above, and ask for references from installations of your house type.
How do I get a quote from Crystal Sigma Ltd?
This listing is unclaimed, so we do not publish its contact details. Compare other installers nearby and check each firm's own contact route. Compare quotes where contact is available: other listings in Greater London include Octopus Energy Services Limited, Switched On London Ltd t/a Switched On London and On Point Plumbing Ltd. Check each firm's current certification and service area.
Boiler Upgrade Scheme
£7,500
off an eligible heat pump, or £9,000 for qualifying off-gas-grid oil/LPG replacements with an air-to-water or ground-source system
A currently registered installer applies on your behalf for an eligible project. Confirm this firm's status and the applicable grant before accepting a quote.
On a lower income and in England? The council-run Warm Homes: Local Grant can pay for the work in full instead.
Compare every UK heat pump grant →Guides for Greater London homeowners
Wondering whether you qualify for a grant? Check the current property, fuel, technology and installer rules before relying on any amount. Compare every UK heat pump grant.
Similar to Crystal Sigma Ltd
