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Claim this listingCrystal Sigma Ltd
4.7
35 Google reviews
1–2 days
Typical install time
£7,500
BUS grant amount
About Crystal Sigma Ltd
Crystal Sigma Ltd is an MCS certified air source and exhaust air installer based in n/a. They are registered with the Boiler Upgrade Scheme, meaning they can help you claim up to £7,500 towards your installation.
Coverage area
Based in n/a, NW27AY
Areas served:
Reviews
4.7
35 Google reviews
Based on verified Google reviews
Peter Henderson
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.
Melina Ngo
The installation of our Daikin air conditioning units by Crystal Sigma Ltd was excellent. Samir coordinated the installation brilliantly - his team were professional, clean and tidy and installed the units very painlessly in two days. Would not hesitate to recommend.
John Heders
Excellent ! This is the second time I've used Crystal Sigma for a residential a/c installation in my own home. They are highly professional, easy to work with, prompt & thoroughly reliable. I will use again.
Abid Shaikh
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.
Robert Tomlinson
I was hugely impressed with the service; from obtaining the quote to the final install it was all completely painless and very quick. The installers on site were excellent, friendly and professional and extremely clean and tidy – we didn’t have to clean up after them at all. Overall very happy and would certainly recommend.
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Frequently asked questions
How do I know you’re properly qualified and certified to install heat pumps?
We are MCS‑certified and registered with an approved consumer protection/competent person scheme, which is essential for quality assurance and to access grants like the Boiler Upgrade Scheme (BUS).
Can you tell me if a heat pump is actually suitable for my home?
We carry out a detailed home assessment, including property type, insulation levels, existing heating system and available outdoor space, to confirm whether a heat pump is a good fit.
What type and size of heat pump will you recommend for my property, and why?
We design the system using a heat‑loss calculation for your home, then match the correct kW size and model (for example, air‑source vs ground‑source) so it runs efficiently and reliably.
What will the full installation cost be, and what’s included in your quote?
Our fixed quote clearly lists the heat pump, cylinder, controls, labour, scaffolding (if needed), electrical work and any radiator or pipework upgrades, so you know exactly what you’re paying for.
Can you help me access government grants like the Boiler Upgrade Scheme?
Yes, as an MCS installer we can confirm your eligibility, apply for the BUS grant (worth up to £7,500) on your behalf and deduct it directly from your quote.
How much disruption should I expect during installation, and how long does it take?
A typical air‑source heat pump installation takes around 2–5 days, and we’ll agree locations for the indoor and outdoor units, manage any planning considerations and keep you informed each day.
Will I need to replace my radiators or upgrade anything else in my home?
After the heat‑loss survey, we’ll advise if any radiators, pipework, electrics or hot‑water cylinder need upgrading so the system can run efficiently at lower flow temperatures.
How noisy is the outdoor unit and where will it be installed?
Modern heat pumps are designed to be quiet and must meet UK noise regulations; we’ll position the unit to minimise any impact on you and your neighbours and comply with local planning rules.
What warranties, servicing and aftercare do you provide?
You’ll get manufacturer warranties on the heat pump plus our workmanship guarantee, and we offer ongoing servicing and support to keep your system performing at its best.
What running costs and savings can I realistically expect compared to my current boiler?
We’ll estimate your likely annual running costs and potential savings based on your current fuel type, insulation level and tariffs, using real‑world performance data rather than lab figures.
Boiler Upgrade Scheme
Up to £7,500
off your heat pump installation
This installer handles the full BUS grant application — deducted directly from your quote. No upfront payment needed for the grant amount.
Scheme open until 2028 — limited funding available
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