Wall Mounted Air Conditioning Guide

Wall mounted air conditioning systems, or split system air conditioners are one of the most popular types of air conditioning available due to their effectiveness at cooling rooms.

They comprise of two different units, an indoor and outdoor unit. The indoor unit is mounted on the wall and the outdoor unit is usually placed on the ground or against a wall. The two units are connected by pipe/duct which is fed through the wall and they work together to cool the room. The indoor unit is usually extremely quiet, whereas the outdoor unit tends to be noisier in operation.

Wall Mounted Air Conditioners

Wall Mounted Air Conditioners

Portable Air Conditioners

Portable Air Conditioners

Ceiling Cassette Air Conditioning

Ceiling Cassette Air Conditioning

How do Wall Mounted Air Conditioning Units work?

The air from the room is drawn into the indoor unit and travels over a condenser which is then cooled by a refrigerant gas. The cool air is then re-circulated back into the room whilst the hot air is vented out through the outdoor unit. This process continues until the room reaches the temperature desired.

*It is important to ensure there is enough space around the wall mounted unit to allow the air to comfortably flow in and out.

Wall mounted air conditioning units require professional installation by a F-Gas qualified engineer but they have the benefit of clearing up floor space and are also quieter than portable air conditioning units.


Many wall mounted air conditioning units also come equipped with a heat pump facility for heating in the winter months making them 2-in-1 units, cooling and heating. A remote control is often also supplied for functional and practical use.

The combination of sophisticated controls and a heat pump means that the air space within a room can effectively be ‘climate controlled’ by modern split air conditioning units keeping the room at the desired temperature.

Most wall mounted air conditioners also now have a number of control modes and timers so that the operation of the unit can be pre-programmed, such as the direction and swing operation of the louvers.

On the indoor component, an air filter is always operating to purify the air and protect the coils from dust and bacteria particles.

Frequently Asked Questions

Why is a Wall Mounted Air Conditioner Advantageous?

Wall mounted air conditioning units have an extremely high cooling power. They’re also great for filtering the air, clearing dust and pollen from the environment. Purchasing a wall mounted air conditioner does cost more initially, but the savings on energy and bills become apparent over time. 

Modern wall mounted air conditioning units are very sleek and much more aesthetically pleasing than other air conditioning models such as portable air conditioners which often do not compliment the design of a room.

Do I need to change the filter?

Filters should always be regularly changed to ensure the unit is always running efficiently. With a clean filter, an air conditioning unit is more prone to break down as filters can clog up the unit with dust particles and debris if not looked after.

Dependent upon the type of filter a unit has, the timeframe for changing a filter can vary from weeks to months.

*Washable filters can be cleaned multiple times before eventually being replaced.

When purchasing a wall mounted air conditioning unit, always do your research beforehand to ensure you make the right decision. At AirconCentre.co.uk, we pride ourselves on providing a quality range of air conditioners from the best manufacturers at only the best prices. If you're unsure as to which air conditioner is right for you, you can use our LiveChat to speak to an expert, or if you prefer to speak to someone, our dedicated Customer Services team are on hand to assist. Call us on 0800 865 4567.