Fully internal heat-pump air conditioning for London homes – with no conventional outdoor condenser.
Cool You’s wall-mounted air conditioning units provide powerful, quiet cooling for apartments, listed buildings and other properties where an outdoor condenser is unsuitable, restricted or simply unwanted.
Each system combines a sleek, wall-mounted room unit with a compact, water-cooled condenser concealed elsewhere in your property.
Our experienced, F-Gas-certified engineers install everything, with no subcontractors and minimal disruption to your home.
Wall-Mounted Air Conditioning Without an Outdoor Unit
Most conventional wall-mounted air conditioning systems connect to a large condenser installed outside the property. This can create problems in London apartments, leasehold developments, listed buildings and conservation areas.
Cool You offers a different solution.
Our wall-mounted air conditioning uses a compact, internal water-cooled condenser instead of a conventional outdoor unit. The room unit delivers the cooling you expect from premium fitted air conditioning, while the condenser sits discreetly inside a cupboard, utility area, bathroom, cloakroom or beneath a suitable worktop.
No conventional condenser is attached to an outside wall, balcony or roof. This preserves your property's external appearance and makes permanent air conditioning possible in many homes where a traditional system cannot be installed.
Learn more about air conditioning without an outdoor unit.
Why Choose a Cool You Wall-Mounted System?
Our wall-mounted systems are designed specifically for demanding residential installations.
Fully internal air conditioning with no conventional outdoor condenser
Ideal for retrofitting completed homes
Powerful heat-pump cooling with secondary heating
Quiet room units suitable for bedrooms, living rooms and home offices
Energy-efficient DC inverter technology
A++ energy-efficiency rating
Modern environmentally friendly R32 refrigerant
Wi-Fi and i-FEEL temperature control
Single-room and multi-room configurations
Up to four wall-mounted room units from one suitable internal condenser
Installation by Cool You’s own F-Gas-certified engineers
ZERO VAT options for qualifying residential end-user installations
Full six-year parts and labour warranty, subject to the maintenance terms detailed below
Ideal for Retrofit Installation in London Homes
Wall-mounted air conditioning is normally the most straightforward choice when cooling an existing home.
The room unit is positioned high on the wall, allowing it to distribute cooled air effectively without taking up valuable floor space. Refrigeration pipework is concealed wherever the property allows, and the compact internal condenser is installed out of sight.
Wall-mounted systems are particularly suitable for:
- Modern London apartments
- Leasehold flats
- Bedrooms and living rooms
- Open-plan kitchens and living areas
- Home offices and studies
- Loft conversions
- Listed and period properties
- Conservation-area homes
- High-rise developments
- Properties without a balcony or suitable external wall
- Homes where the owner does not want an outside condenser
Explore our specialist air conditioning for apartments and flats and air conditioning for listed buildings.
How Does Fully Internal Wall-Mounted Air Conditioning Work?
The wall-mounted room unit cools and dehumidifies the air much like a conventional premium split air conditioning system.
The key difference is how it removes the collected heat.
A conventional system transfers heat to an outdoor condenser. A Cool You system transfers it through concealed refrigeration pipework to a compact water-cooled condenser installed inside your property. The condenser uses a controlled water supply to carry away the unwanted heat.
The system uses water only when cooling is required. Its motorised control valve regulates flow automatically and closes when water isn't needed.
The installation consists of:
- A quiet wall-mounted room unit in each room being cooled.
- Concealed refrigeration pipework connecting the room unit to the condenser.
- A compact internal condenser positioned discreetly within the property.
- Connections to the property’s water supply, drainage and electrical services.
Everything remains inside the property, with no conventional condenser box mounted externally.
Read our detailed guide to fully internal water-cooled air conditioning.
Choose the Right Wall-Mounted Unit for Your Room
Every property is different, so we calculate each room's cooling requirement before recommending a system.
Factors include:
- Room dimensions
- Ceiling height
- Window size and orientation
- Solar heat gain
- Insulation and ventilation
- Room use and occupancy
- Heat generated by appliances
- The position of the proposed room unit
- The number of rooms requiring cooling
Easily concealed water-cooled condenser
The internal condenser is easily concealed in a hall cupboard or beneath a suitable kitchen worktop.
A whisper-quiet room unit
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
3.5kW Wall-Mounted System
Usually suited to a typical bedroom, study, home office or smaller living area.
5.3kW Wall-Mounted System
Often specified for a medium-sized open-plan kitchen, living room or dining area.
7kW Wall-Mounted System
Designed for larger open-plan spaces, substantial glazing or rooms with greater heat gain.
These examples are a guide. Your Cool You surveyor will calculate the appropriate capacity and recommend the correct system for your property.
Why Choose Cool You?
Cool You specialises in fully internal air conditioning for London homes.
When you choose us, you benefit from:
- More than 15 years of specialist experience
- Thousands of completed installations
- Extensive experience in London apartments and restricted properties
- Bespoke system design
- Our own F-Gas-certified and DBS-checked engineers
- No installation subcontractors
- Wall-mounted and hidden ducted options
- Single-room and multi-room solutions
- Transparent guide prices
- Long-term maintenance and technical support
- Six-year parts and labour warranty, subject to maintenance
- Verified independent customer reviews
We understand the challenges presented by modern apartments, mansion blocks, listed buildings and architecturally sensitive homes. That experience allows us to find solutions where conventional air conditioning installers may struggle.
Our wall-mounted systems are particularly suitable for existing London homes where an outdoor condenser is restricted or impractical. Discover more about our specialist air conditioning installation services in London
See Our Wall-Mounted Installations
Cool You has installed wall-mounted air conditioning throughout London, from modern high-rise apartments and riverside developments to mansion blocks, converted warehouses and listed properties.
Our case studies show:
- Where the internal condenser was concealed
- How pipework was routed
- Which rooms were cooled
- The capacity selected
- The challenges presented by the property
- How the completed installation looks
Explore our London apartment air conditioning case studies
How Much Does Wall-Mounted Air Conditioning Cost?
Fully installed Cool You wall-mounted heat-pump systems currently start from £5,350 for a typical single-room installation. Our guide prices include:
- The wall-mounted room unit
- The internal water-cooled condenser
- Refrigeration pipework
- Standard installation materials
- Professional installation
- Testing and commissioning
- Customer handover
- Warranty protection, subject to the applicable terms
Every installation is bespoke. The final cost depends on the required cooling capacity, number of rooms, condenser configuration, pipe routes, access and your property's construction.
Qualifying residential end-user heat-pump installations may be eligible for ZERO VAT treatment. Eligibility and the applicable VAT treatment will be confirmed in your written quotation.
View our full wall-mounted air conditioning installation costs.
Every Cool You Air Conditioning System Is Unique
No two Cool You installations are identical.
Every system is designed around the property, the rooms being cooled and the people who live there. We consider the practical details—from heat gain and condenser positioning to pipe routes, interior finishes and property restrictions—before recommending a solution.
Let us earn our money. We have worked in every type of property and overcome almost every obstacle. There is very little we have not seen before. Our website is an excellent source of information, but we would rather speak with you. Call 0207 043 2275, and we will guide you towards an exclusive bespoke solution, meticulously designed for your property and installed by our in-house team.
No conventional external condenser, minimal disruption and no compromise—just a cool and comfortable home.
Others may try to match our systems, but they cannot replicate the experience and individual attention we bring to every installation. It is pretty flattering, we must admit!
Six-Year Parts and Labour Warranty
Every Cool You installation includes our full six-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 one-year warranty, giving you clear, comprehensive cover across your system.
Our relationship with you does not end when the installation is complete. Cool You provides ongoing servicing, technical support and access to replacement components through the same specialist team responsible for your system.
We're really proud of our service and our wall mounted air conditioning units. Don't take our word for it. Have a look at some of our recent reviews.
How Long Do Things Take?
How much disruption and mess will there be?
Frequently Asked Questions About Wall-Mounted Air Conditioning
Book Your Free Wall-Mounted Air Conditioning Survey
If you want permanent wall-mounted air conditioning but cannot—or do not want to—install an outdoor condenser, speak to Cool You. Our team will assess your home, explain what is possible and recommend a bespoke system designed around your property.
Call 0207 043 2275 or complete our enquiry form below to arrange your free home survey.