31 years of unrivalled air conditioning installations, repairs & maintenance. London’s No 1 HVAC Contractor.

Commercial air conditioning in London

Commercial Air Conditioning Services

We will help you to achieve a perfectly comfortable working environment all year round with our Air Conditioning, Heating & Ventilation Services.

Home air conditioning London

Home air conditioning installation

Highly efficient heat pump air conditioners provide superior performance and will keep your home warm in winter & cool in summer.

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Welcome to Complete Cooling Systems Ltd – an air conditioning company you can rely on

We provide tailor-made climate control solutions to London based commercial and residential properties alike.

Established in 1984 and having enjoyed 31 years in the industry; we are a trusted & reliable heating, ventilating & air conditioning installation, repairs and maintenance company.

We carry out maintenance and emergency repairs on all types of climate control systems such as Split & Multisplit  air con systems,  Air Handling Units, Fan Coil Units, Chillers, HRV systems and BMS controls.

Quality Matters

We believe the key to our longevity lies with the fact that we genuinely want our customers to be happy!  We are ISO9001:2008 certified and are 100% committed to our customers and our own staff.  We listen to customer needs and provide an honest and reliable service – all backed up by our engineer’s superior knowledge and ongoing expertise in the air conditioning industry.

Free Site Survey and Quotation

For new installations, we offer a completely free site survey which allows us to assess your property and design an air conditioning or ventilation system to suit your property’s individual attributes. We will then give you a free and accurate quotation. We are always happy to price match against a like-for-like quotation.

Skilled and Professional engineers

Our air conditioning installations are carried out by highly skilled and professional engineers. Needless to say, our engineers are City & Guilds qualified and F-gas certified.  Our engineers are respectful and always ensure that there is minimal disruption whilst on your premises.

Maintenance Packages tailored to your site

We offer maintenance packages to help ensure your air conditioning systems continue to run as effectively and as energy efficiently as possible.


Our engineers are skilled in diagnosing air conditioning faults on all types of systems. Let us help to get your plant up and running by calling us on 0800 298 0242.

Reliable, Leading Brands

A climate control or ventilation system is an important investment. We only install products from leading manufacturers such as Daikin and Mitsubishi Electric or Mitsubishi Heavy Industries. All of our installations are backed up with manufacturer warranties of up to 5 years.

Call us or email now for a free quotation on 0800 298 0242