Wall mounted air conditioning units are one of our most popular and adaptable solutions for retrofitted cooling in London flats and apartments. Each system combines a sleek wall-mounted room unit with a state-of-the-art, water-cooled internal condenser (the condenser is usually situated in a utility cupboard). This eliminates the need for any external condenser.
The units are designed to operate at whisper-quiet levels and are extremely energy efficient. Sitting high on a wall, these wall units will blend discreetly in your space while keeping you perfectly cool. Being wi-fi enabled, our systems use the leading i-feel system that allows you to control the room temperature from wherever you are in the room.
As part of Cool You’s fully internal water-cooled air conditioning systems, these wall-mounted units are purpose-built for London apartments and listed buildings in London where external condensers are not allowed. They give exceptional performance, rivalling and often surpassing industry-leading conventional systems. This level of performance makes them the ideal choice when installing an outside condenser box isn’t an option.
Wall Mounted Air Conditioning Units, No External Condenser - The Benefits of our Fully Internal Water Cooled Air Conditioning Systems
Cool You's ultimate wall mounted air conditioning unit provides a high level of comfort, whisper-quiet low noise, and cost-effective installation. Our water-cooled internal air 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
- A bulletproof 6-year parts and labour warranty

Wall Mounted Air Conditioning Units - Key Features Of Our Fully Internal Water-Cooled Systems
- 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
- The latest environmentally friendly R32 refrigerant
- 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?
It's all on the inside... Wall mounted air conditioning
Our entirely internal solution includes a whisper-quiet room unit (fan-coil) - wall mounted air conditioning unit. 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.


Wall Mounted Air Conditioning Units - No visible pipework and no ugly condenser outside...
Our system's installation is designed for your convenience. The refrigeration pipework (using the latest environmentally friendly R32 refrigerant) 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
If you are interested in our wall mounted air conditioning units and how long things take, read on. 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.









