The specialists in air conditioning without an outside unit for London apartments and listed buildings. “It's all we do!”

Leading the way in fully internal home air conditioning without an outside unit since 2006

  • Told You Can’t Have An Outside Condenser? We Have The Best Solution
  • Ideal for Retro Fitting in Apartments and Listed Buildings
  • The Smallest, Quietest, Most Energy Efficient Internal Condensers And Exclusive To Cool You
  • The Latest Lower Environmental Impact R32 Refrigerant
  • Everything Is Contained Within Your Property
  • Installed And Maintained By Our Own F-Gas Engineers With A Full 5-Year Parts And Labour Warranty







Savva our Technical Director is here to advise on 07866 360892 or

Cool You's Systems have no external condenser box

No External Condenser Box

We can air condition your home completely internally with no disruption - 100% guaranteed!

A Cool You system comes with a bullet proof 5-year warranty

In-House Team

All installation and on-going maintenance work is carried out by our own F-Gas engineers


5-Year Warranty

A bulletproof 5-year parts and labour warranty

Installation by Cool You is quick and hassle free

Quick & Hassle Free

Your new air conditioning can be installed in just one day with our fully qualified specialists

Cool You's air conditioning without an outside unit are extremely energy efficient

Energy Efficient

Our technology uses energy efficient DC inverter technology. We care for the environment.

A Cool You system will give you great air quality

Great Air Quality

Filters in our systems help remove dust, pollutants, and dust mites.

We’re Rated Excellent on TrustPilot

Excellent sales and after sales service I must say I really appreciate the good quality service you guys provide. Please keep it up. Thanks very much, I was satisfied as usual. You guys always turn up when I call your help lines and your technicians are always ready to do everything to make things better for the benefit of the customer. This is unlike several vendors or contractors I’ve met. After sales customer service is fantastic. I Like the culture of excellence. You guys are a class apart. Please keep it up. Kudos to your entire team. Well done.
6. July, 2021.
My first experience of Cool You was a good one. Tommy, their youthful engineer (I'm 73) took the time to explain their system that I had taken over in my new apartment so that I could use my three units safely and efficiently. Further back-up came from head office who sent my operational instructions that had not been left by the previous owners. I feel confident that any difficulties that I might encounter in the future will be dealt with kindly and efficiently.
Nigel Hodd
5. July, 2021.
Really happy with the thorough on site assessment of our flat, which compared to other visits by another team, was streets ahead in being able to answer my queries and give me the reassurance we needed to proceed. The installation was on time and effortless, and we love our new air con unit! We can barely hear the condenser during it's operation, and we can chill a previously inhospitable sweat-box of a room in the summer in under a couple of minutes.
Omer Mustafa
3. July, 2021.
Excellent service and equipment I'm writing this on behalf of my parents. At the beginning of June we had air conditioning installed in the lounge by Ultra Cooling. Paul Kibble and did the job. It was a very technical assembly and they were obviously experienced experts. Their specialist equipment ensured there was not a speck of dust or cleaning afterwards. The system works well and from our experience we would definitely recommend them and use them again 10/10
Clare Dew
30. June, 2021.
A Cool Summer I have recently had a Cool You aircon system installed in my London apartment. My living room has floor to ceiling glazing with a southerly aspect and in the Summer it used to become unbearably hot and humid. Not anymore! This water-cooled system now keeps it at the temperature I choose and my apartment living has been transformed. I would highly recommend this aircon system. The initial cost may seem high but be assured the product is first rate and Cool You are highly professional in the service they provide with their speedy and tidy installation procedures, their subsequent aftercare, and the efficient and courteous way they deal with their clients.
23. June, 2021.
A great product and team - pre and post sales Excellent product and customer care. Continuous support and responsive team who don’t drop you the second they’ve made the sale, but genuinely care about your considerations and any subsequent servicing. Very understanding and accommodating over the Covid period.
Tobias Lee
21. June, 2021.
Easy, friendly, no extras, no fuss. The site visit was timely, sensible, quote followed quickly, dates given were all met. The installation was just over a half day (2 rooms, one condenser). No mess left. Product works well (for the last 3 days since installation). All easy, friendly, no extras, no fuss.
5. June, 2021.
Excellent service visit . The engineer was on time , courteous and respectful of my home . A company to be recommended to ours . Thank you
4. June, 2021.
Expensive but works flawlessly The solution is expensive but you get what you pay for - and what you get is a very efficient air conditioning system, installed professionally and to a high standard. My property has 2 bedrooms located in the loft (one of which is south facing) which can get uncomfortably hot in the summer. After the last year's summer and having to deal with a noisy and rather fiddly (especially with Velux windows involved) portable aircon I decided to bite the bullet and get Cool You to install a water cooled solution in my property (external compressors were not allowed by the freeholder). I have to say that it's more than adequate to cool (and maintain) the entire upstairs to a pleasant 22C in a matter of minutes which is a huge quality of life improvement. The installation was also very efficient and done professionally - the installers arrived punctually at 8am and were done by lunchtime - I honestly did not expect such efficiency given the rather unusual layout of my property and what I though could have been challenges with finding the right spot to install the condenser. They installed the it neatly in the loft (I initially thought there might be issues with water and power supply but I shouldn't have worried as they somehow did their magic and got water, power and waste sorted) and two wall-mounted units in the bedrooms. There was indeed no mess and minimal disruption, which I was initially rather sceptical about despite the claims on their website. So far the system does the job although I can't comment on the running costs as it's only been a few weeks since the installation. Overall a good experience, job done to a very high standard and delivering on their promise. Yes, it's not cheap but I wouldn't think twice about spending the money given how much more liveable my property now is in the current hot weather.
3. June, 2021.
Great a/c solution in a flat Really neat a/c system with no external fittings needed so it was the ideal solution for our flat and I couldn’t be happier. Prompt service and helpful fitters.
Nigel in London
1. June, 2021.

Internal Condenser Air Conditioning - All properties can benefit from air conditioning without an outside unit

We continuously assist customers who have been told that air conditioning is not a possibility for their property.

If you have found yourself in a similar situation, we are here to provide assistance and eliminate your frustration. Whether your property’s issue is a lack of space or its protected status, our self-contained air conditioning systems will be the solution.

With no external condenser to worry about, we can 100% guarantee a solution that is right for you and your property.

No Planning Permission Required

With planning permission not usually required, our air conditioning systems without an outside unit is the answer for apartments, listed buildings, properties in conservation areas and properties simply lacking in outside space.

Save Time and Stay Safe – Video Site Surveys

Following customer demand, we introduced video site surveys with Savva, using FaceTime / What’s App to carry our site surveys. Customers have been delighted to do this, saving time and in the current time, staying safe.

What you should expect and what you will get from Cool You

Our knowledge and experience in all types of properties mean we can meet the specific challenges posed by both retrofitting self-contained air conditioning within modern apartments and also older and listed buildings.

  • A seamless process from your initial enquiry, to the survey and through to completion
  • A wealth of experience – we are the specialists in fully internal air conditioning. It is all we do. Just look at our case studies and Trust Pilot reviews. In essence, we have installed fully internal air conditioning in 100’s of apartments in London
  • A great solution if you’re working from home giving you the benefits of a better and more productive working environment
  • The very best fully internal air conditioning solution – we don’t compromise when it comes to product development
  • Our installation teams are highly trained, professional, F-Gas certified, and DBS checked. They will install your new air conditioning system with minimum disruption, leaving your apartment, clean, tidy and beautifully air-conditioned
  • After we have installed your air conditioning, our committed and knowledgeable support team are available to help 24/7 / 365
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The Leading Provider of Air Conditioning Without An Outside Unit

For your complete peace of mind and convenience, payments can be made via BACS and all major credit cards.