Your comfort is our business

Award-winning air conditioning solutions with outstanding service before, during and after installation.

Sub-Cool FM is a specialist air conditioning company and installer of air conditioning units and solutions for homes and businesses.

Our vision for Sub-Cool FM is simple: we aim to become the leading air conditioning service provider for the South East and beyond. We will do this by delivering outstanding air conditioning installations and repair services. Our focus is on quality, reliability, honesty, value for money, and the best air conditioning workmanship. See our reviews on Checkatrade below.

Best Air-Conditioning Provider

Award-winning air conditioning suppliers

Best air-conditioning and FM service provider – SE England.

“Sub-Cool FM have completely transformed the residential sector in the South East of England. This has been achieved by providing customers with the full maximum warranties available on equipment and only offering best-in-class brands.”

Alternative Heating Systems | Air Conditioning London | Sub Cool FM

Unrivalled air conditioning services in the following areas:

Our team of engineers offer expert advice for all leading air conditioning brands and alternative heating systems.

Services we offer:

  • VRV(F)
  • Single split/multi splits
  • Cold rooms
  • Hot water system

Recent projects

Air Con Guide


Better Cool Sub

Clients we have worked with

TSG Logo
WCSS logo
JUB logo
EC Logo
NUS Logo

Thinking about air conditioning?

Still not quite sure if installing air conditioning is right for you? Read our frequently asked questions or watch our vlogs to understand how it all works.

Our Process











What people are saying about us

Residential Air Conditioning Brighton, Crawley, London, Surrey, Sussex, Kent

With reduced rates of 5% VAT and improved technology, many homeowners are now seeking the benefits that air conditioning offers:

  • Discreet and stylish units
  • Excellent heating and cooling solution for conservatories
  • Great temperature control for well-insulated loft conversions and new builds
  • An affordable way to heat & cool extensions without putting added strain on your boiler
  • Energy efficiency – our customers boast savings of 2/3rds compared to using a boiler
  • Increase the value and desirability of your home
  • Control your units remotely using your mobile phone
  • Reduce allergens in the air for asthma sufferers
  • Improve sleep – manage the temperature of your bedroom all year round and keep out the noise with windows shut. Find out the importance of sleep with our  #Sleepfacts

Commercial Air Conditioning Brighton, Crawley, London Surrey, Sussex, Kent

Sub-Cool FM has a great reputation and track record working with the cooperate sector. We can enhance system design to greatly improve the value and flexibility of large commercial projects.

Benefits of our commercial solutions:

  • We can advise and help design the system
  • Manufacturer trained on a range of industry systems
  • Speedy turn-around times
  • We install the best equipment which is reliable and trusted

Air Conditioning Maintenance London, Brighton, Crawley, Surrey, Sussex, Kent

Call-out for repairs and faults, and the best in ongoing service and maintenance to ensure your air-conditioning works as cost-effectively and efficiently as possible.

Our Accreditations

Health and Safety Direct
Alcumus Safe Contractor
AMP Premier Solutions Partner

Trusted Installers

Mitsubishi Electric Diamond Quality Partner - SubCool FM - for installation of air conditioning
Daikin Air Conditioning D1 Business Partner logo
Midea logo
Panasonic air conditioning logo

Check out our helpful video tips

Jacob at SubCoolFM

Connect with Jacob:

Meet Jacob

Jacob runs a tight ship at Sub-Cool FM, going a step above and beyond to ensure customer satisfaction. He cares about the details and trains his staff to the highest levels and believes this is what makes Sub-Cool FM stand out.

“Having a 10 out of 10 customer experience encourages people to want to work with us. We aren’t interested in a poor value customer experience.”

The Sub-Cool way involves engineers with a passion to deliver not salesmen consumed by a drive to sell. The team offer an unrivalled service every step of the way, from the initial survey through to completion and follow-up. Jacob, an engineer himself, has in-depth knowledge and experience of different systems, and is happy to give advice and support.