SubCoolFM Sussex Based Bespoke Air Conditioning Service Specialists

Our Vision

Our vision for Sub-Cool FM is simple: we aim to become the leading air conditioning  provider in the South East and beyond. We will do this by delivering an outstanding service that gives our customers the very best quality, reliability, value for money, and workmanship.

Service Excellence

We are passionate about our industry and about ensuring we go the extra mile for every client, recognising that each has bespoke needs and requirements.  We will also take the time and energy to give a tailor-made, consultative, honest and respectful service. We are fully qualified and accredited, have won awards for our service provision, and have even been asked to participate in the Parliamentary Review to share best practices. 

Commercial clients benefit from our site-specific engineers who ensure minimum inconvenience and downtime, getting sites  up and running cost-effectively as fast as possible.

Through our commitment and long-term relationships, we have negotiated deals with leading suppliers to ensure we can pass on to our customers the benefits of great rates, offers and training.


Benefits for you

  • We are fully independent and can advise across brands, products and systems
  • You will receive a bespoke service, not one-size fits all
  • You will get the best-in-class systems for your budget
  • We will provide the highest level of warranty we can
  • We will offer the best technology and innovation
  • Design, survey, installation and audit will be best practice
  • External piping will be discreet with quality fittings
  • We will be prompt, reliable, professional and respectful at all times



We have a range of resources to help inform our clients. Check out our social pages, our YouTube channel or our FAQ page.

Corporate Citizenship

We are highly conscious of concerns about global climate change and co2 emissions, and we offer only the most efficient and sustainable options available on the market. We use pro-biotic cleaning problems rather than harsh chemicals in our servicing and we seek ways to minimise our environmental impact.

Which air conditioning unit should I buy?

Jacob Swei, Managing Director & Lead Engineer

Jacob Swei founded Sub-Cool FM in 2014 after numerous years working in the air-conditioning industry. A qualified engineer, Jacob had frustrations and wanted to do things differently, so he started up his own business. Very quickly Jacob was able to build up a team around him,  and SubCool continues to grow.  His focus has been to provide a professional service with unrivalled attention to detail and a genuine passion to do the best for customers.

Jacob has witnessed first-hand over the years how larger companies carry out a basic standard of work at a premium price, hiding behind their status. That’s not the Sub-Cool way. SubCool ensure every job, no matter how big or small, is carried out above any national standard, using the longest-lasting, most hard-wearing materials the market can offer.

Jacob stood in front of a flip chart that reads "How to be a superhero engineer"