At Cool You, we specialise in fully internal, wall-mounted air conditioning systems with no external condenser, designed specifically for apartments, listed buildings, and homes in conservation areas.
Our systems provide powerful, whisper-quiet cooling and year-round comfort — all while preserving your building's look.
Our most popular and versatile retro-fitted air conditioning system includes a wall-mounted air conditioner with no outdoor unit, which is highly efficient at keeping you cool.These room units are versatile and can be mounted in almost any location, sitting high up in the room and seamlessly blending into the background of most settings.
These wall-mounted room units are an internal part of Cool You's fully internal water-cooled air conditioning systems and have been specially designed and developed for apartments and listed buildings in London where an outside condenser is not permitted.
Our water-cooled systems deliver exceptional performance, surpassing even industry-leading conventional air conditioning brands with an outside condenser.
Wall Mounted Air Conditioner No Outdoor Unit - The Benefits of our Fully Internal Water Cooled Air Conditioning Systems.
Providing a high level of comfort, whisper-quite - low noise, and cost-effective installation, our water-cooled internal wall mounted air conditioner no outdoor unit conditioning systems offer many benefits while cooling your property.
- Installation from just one day by our specialist FGAS refrigeration engineers.
- Our air conditioning system offers a cost-effective solution. We can cool multiple rooms with just one internal condenser, tailoring the service to your property's cooling needs. So, it may not cost as much as you think - speak to an expert today!
- No outside unit—our water cooled air conditioning solutions provide the solution to stringent property restrictions and apartments with limited exterior space. Everything is contained internally.
- Energy-efficient DC inverter technology significantly reduces energy consumption compared to non-inverters and is comparable to the latest conventional AC systems, which can have an external condenser.
- Compact design – The smallest and most energy-efficient condensers, designed and built by us, without compromise, for London apartments with whisper-quiet operation
- Ducted room units available
- It provides cooling simply by being plumbed into your property's cold water supply, just like a dishwasher or washing machine
- No pipe work on show
- Extensive maintenance programme available with complete parts back-up
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Industry-Leading 6-Year Warranty for Complete Peace of Mind. Every Cool You installation is backed by our full 6-year parts and labour warranty – covering the room unit, internal condenser, and all refrigeration pipework, subject to a signed maintenance agreement. This means you can relax, knowing your system is protected long after installation. For additional components such as the condensate pump (where fitted) and plumbing connections at the condenser, we provide a 1-year warranty, giving you clear, comprehensive cover across every part of your system.
Wall Mounted Air Conditioner No Outdoor Unit - Key Features Of Our Fully Internal Water-Cooled Systems
Our fully internal water cooled air conditioning solutions have been specially designed and developed for apartments and listed buildings in London where you cannot have an outside condenser.
- Everything is enclosed in your property
- No outside access required
- Ideal for retrofitting in your London apartment or listed building
- Easily concealed condensing unit
- ‘A++’ rated for Energy Efficiency
- Energy efficient DC inverter technology
- We can air condition up to three rooms from one compact multi-split internal condenser serving our wall mounted air conditioning units
- Different room unit options
- Great for home-workers
- i-FEEL closer-to-you temperature control as standard on all DC inverter systems
- No outside condenser
To find out more, watch the video below about our water cooled air conditioning systems
What is an Internal Water Cooled
Air Conditioning System and How Does it Work?
With most London apartment buildings, you are not permitted to use external condensers or make penetrations through the exterior walls of the building. Our internal water-cooled air conditioning systems are a no-compromise solution for fully-fledged air conditioning where you cannot have an external condenser box.
It's all on the inside... Wall mounted air conditioner without outdoor unit
Our entirely internal wall mounted air conditioner with no outdoor unit solution includes a whisper-quiet room unit (fan-coil). This is installed in the room that's going to be air-conditioned. We typically specify a wall-mounted unit for a retrofit installation. Still, it can also be a concealed ducted unit, usually specified during complete home refurbishments. The room units are sleek and neutral, so they will not clash with your colour scheme.
The room unit is the element that gives you complete climate control through air purification, cooling, and dehumidification, providing you with the ideal environment through effortless cooling.
Easily concealed water cooler condenser
The internal condenser is easily conscealed in a hall cupboard or even in a kitchen cupboard
The internal condenser is easily conscealed in a hall cupboard or even in a kitchen cupboard
A whisper-quiet room unit
Cooling the open plan kitchen/living/dining area
Cooling the open plan kitchen/living/dining area
Two water-cooled condensers
These were installed within a built-in wardrobe in a bathroom
Effortless cooling
With a whisper-quiet room unit in a kitchen
Space-saving installation
Internal condenser built into the ceiling void to save space in this apartment
Space-saving installation
Internal condenser built into the ceiling void to save space in this apartment
No visible pipework and no ugly condenser outside...
Our wall mounted air conditioner no outdoor unit system's installation is designed for your convenience. The refrigeration pipework typically runs from the room unit into the ceiling void, which is concealed to the condenser box. Our innovative approach places the condenser on the inside, hidden from view in your London apartment, unlike traditional systems with unsightly external condensers.
In most cases, we strategically position the unit in the utility space or under a kitchen counter, ensuring it remains conveniently hidden yet near the required services. The exact location will be discussed during your site survey, providing a tailored approach that perfectly meets your needs.
Unlike conventional systems, our internal condensers utilise water to dissipate heat in a controlled and highly efficient manner. This pioneering design has allowed us to manufacture a condenser that is a fraction of the size of an external air-cooled box. Our internal condensers are compact, remarkably quiet, and incredibly efficient, a testament to our unwavering commitment to delivering the best product to you, our customer.
Our most popular fully internal water-cooled air conditioning solutions for London apartments - Wall Mounted Heat Pump Systems
How long does it take to install a
Cool You Internal Water Cooled Air Conditioning System?
At Cool You, we pride ourselves on providing a seamless user experience. We prioritise your convenience and aim to simplify the entire process at every stage, from the survey to the installation. We will work around your schedule and ensure we arrive on time, keeping you informed throughout the process.
Our installations are designed to be completed in just one day, minimising any disruption to your daily routine. Upon receiving your enquiry and confirmation for the installation of your entire internal air conditioning system, our highly professional team will strive to arrive at your residence promptly at 8 am. Depending on your apartment and the type of installation, we could complete the installation as early as 4 pm, ensuring a swift and efficient service.
There will be no need for a follow-up appointment, as our team will provide all the necessary information to keep the system running smoothly. The installation process is non-invasive, ensuring that your room remains as spotless as it was before our team entered.
We encourage you to watch our latest videos if you have any doubts. In these videos, our managing director, Savva, answers the question: How long do your entirely internal air conditioning systems take to install? He provides a detailed explanation of the installation process and the factors that can affect the installation time.
How Long Do Things Take?
How much disruption and mess with there be?
Why Choose Cool You
- London’s experts in fully internal air conditioning systems
- Over 15 years’ experience and thousands of installations across the capital
- All work carried out by our own F-Gas certified, DBS-checked engineers
- No subcontractors — everything handled in-house
- 5-Star Trustpilot rating from verified customers
Every Cool You system is designed just for you — bespoke, precise, and built to last, much like a Savile Row tailored suit.
We're really proud of our service and systems. Don't take our word for it. Have a look at some of our recent reviews.
What’s Included in Every Installation
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Full survey and bespoke design
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Installation by Cool You’s own engineers
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Internal condenser and wall-mounted room unit
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Complete testing and commissioning
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Full clean-up — no mess or disruption
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6-year parts and labour warranty
Above all, complete peace of mind and whisper-quiet comfort in your London home.
To enquire about air conditioning in your London home, please contact the team at Cool You at (0207) 043 2275 or fill in the form below and we will get straight back to you.