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People searching for air conditioners without an outdoor unit are on the rise – probably because they’re worried about not having enough space for the outdoor condensing unit, or aren’t permitted to add anything to the outside of their property. But what they might not know is that air conditioning units that don’t have an outdoor unit won’t be as effective as full air conditioning systems, and could even be dangerous. So, should you consider air con that just works through the wall? We’ll try to explain here.

How do air conditioners without outdoor units work?

Standard air condit

Air conditioners use refrigerants which are extremely harmful to the environment if not handled correctly and end up being released into the atmosphere, so air conditioning units are only supposed to be sold to those with the correct qualifications.

If you’ve been able to buy an air conditioner with no outdoor unit yourself, the chances are it’s not gone through the rigorous testing that’s required to ensure that the system is safe to use. We’d recommend steering clear of them and asking a reputable air conditioning installer to give you a quote for a full split or multi-split system.

ioning units are made up of an internal unit, an external unit and pipes that connect the units and coils together. In a normal air conditioning system, the pipes will carry refrigerant between the indoor and outdoor units. The refrigerant transfers heat in and out of the air. When air passes over the coils that have been in contact with the refrigerant, the air will be cooled down as the refrigerant will absorb the heat.

A compressor within the system also keeps the refrigerant moving around the pipes, and fans keep air moving over the coils. The outside unit, often called a condenser, is responsible for releasing the heat to the air outside.

So are these types of units worth it?

In our eyes, we don’t think it’s worth getting an air conditioner with no outdoor unit. Because they don’t have the power of the condenser, they won’t be able to cool large spaces efficiently, so you might not ever get a room as cool as you want it and it might cost you a lot in electricity bills.

Air conditioners use refrigerants which are extremely harmful to the environment if not handled correctly and end up being released into the atmosphere, so air conditioning units are only supposed to be sold to those with the correct qualifications.

If you’ve been able to buy an air conditioner with no outdoor unit yourself, the chances are it’s not gone through the rigorous testing that’s required to ensure that the system is safe to use. We’d recommend steering clear of them and asking a reputable air conditioning installer to give you a quote for a full split or multi-split system.