Water Cooled Air Conditioning
Bespoke internal water cooled air conditioning system installations in London & Home Counties.
Fully Internal Air Conditioning Solutions For Residential & Commercial Properties
- Fully internal installation
- No planning permission required
- Condenser unit hidden
- Suitable for Grade II listed buildings
Have you been told that you cannot install an air conditioner with an external unit due to property restrictions? Our internal air conditioning solutions are ideal for those who live or work in restricted buildings or have limited space. From versatile wall mounted units to discreet ducted systems, we have a solution to meet your requirements.
Traditional AC systems usually require planning permissions due to the external condenser. Water cooled systems require no planning permission and are suitable for installation in apartments and Grade II listed buildings.
We have installed thousands of units across London & Home Counties. We offer high quality, bespoke installations at a competitive price. We offer a free consultation and site survey to help you assess what unit would work for your property.


Our water cooled air conditioning units
MCW 2.0 MULTISPLIT – PDC
- Reduced Water Consumption
- Class A+++/A++
- Gas R32
- Maximum Silence
- Full DC Inverter + H2O Inverter
Over 30 years of Air Conditioning expertise
Since starting in 2002, ACS Installations is the leading supplier of AC products and installations in London and Home Counties.
We offer a bespoke installation service to suit your needs and requirements. If you are looking for an internal AC solution, we should be your first choice.
We have completed hundreds of installations all over London and the Home Counties.

Our Features
Guaranteed Quality
We have accreditations from F-Gas and more so you are in safe hands.
No Outside Unit
We are the pioneers of water cooled air conditioning units in the country.
Energy Efficient Units
Our units are optimised to function at maximum efficiency.
Condenser Hidden
We tailor our installations based on your specific requirements.
Low Noise & WiFi Control
Whisper quiet operation and WiFi enabled air conditioning.
Dedicated Helpdesk
Our London based help desk engineers can assist you when you need us.
Where to install
Internal air conditioning offers great versatility and are ideal for both residential and commercial use. Internal water cooled air conditioners are an ideal solution for residential properties in London and surrounding counties with property restrictions or limited space.

Ideal for restricted properties such as apartments where an outdoor condenser unit is not allowed.

Listed Buildings
If you live in a Grade II listed building, an internal unit can be installed with no planning permission required.

Ideal for rooms throughout your home, including loft conversions with limited space or planning restrictions.

Effective solution for office spaces with planning restrictions to maintain an optimal climate.

If you own a small retail space with restrictions, water cooled units allow you to install air conditioning internally.

Ideal for server rooms, internal units enable you to keep your IT equipment protected all year around.
How it works
Water cooled systems are plumbed directly into your water supply. They use the cold water in a controlled manner to cool the air through the piping system. Unlike traditional air conditioning systems, water cooled units do not require an outdoor unit. The internal condenser is usually hidden within the property in a concealed space such as a cupboard or under the kitchen sink.

Frequently Asked Questions about our water cooled internal condenser units
Some of your questions about our water based air conditioning answered.
Can I install water based air conditioning in a listed or restricted property?
Yes, installing a water cooled air conditioning systems or through the wall air conditioning is the only option you have in a listed or restricted property. Contact us if you would like to discuss getting a water based AC in your home.
Do I need planning permission to install water based air conditioning?
In most cases no, a water based AC unit has the internal condenser hidden in your own home so there is no need for permission.
How long does it take to install?
A typical single split type AC unit will take 1-2 days to install. We can give you a good estimate if you contact us and inform us about your property and what you require.
Do the units make a lot of noise?
Modern units are very quiet. In the workplace, you rarely notice them while in bedrooms at night time certain specific night set back settings slow the fans down to reduce the cooling requirement in line with falling ambient temperatures.
How much will it cost to run?
The electrical power consumption of an average size AC system will be little more than a domestic fridge. The cost of the water consumption element depends on how and what you pay for your water, and indeed the usage characteristics of the user. Water consumption rates vary on unit size and our specialists can advise you according to your requirements.
How does air conditioning work?
Air conditioning works by way of transferring heat from the air inside a room into the internal gas and then pumped along the pipework to an outdoor unit where the gas transfers the heat to the external air. The heat exchange process happens when the internal air is passed over a heat exchanger coil called an evaporator. Inside this evaporator is refrigerant that boils off at a very low temperature making the coil very cold. When the warm air passes over it then heat is absorbed from the air into the coil. The reverse happens with the heat exchanger in the outdoor unit.
Whats the difference between a water cooled air conditioner and a water based air conditioner?
In a water based air conditioners, water is used throughout the system. There are some water based air conditioning systems in the market, such as evaporative coolers, but they are not as efficient as a traditional air conditioning system.
A water cooled system, which we offer is a traditional AC system but with the addition of water use. The features we list above are not available through the other water based system.
Contact our specialist team
Get in touch with our team by phone, email or by filling in the form below.