Linea window air conditioner / through-the-wall air conditioner
This air conditioner is installed through a wall (<20cm thick) or window and is sat on brackets with two thirds of the unit hanging outside the building and one third inside.
Unlike a split system air conditioner, this removes the need to install separate internal and external elements as both jobs are done by the one unit.
Also, unlike a portable system this removes the need to leave a window slightly open to vent the hot air and it doesn't require any manual condensation drainage as it drains externally.
It is very convenient for rooms that have sash windows, as the unit can be placed on brackets through the window with the sash window simply lowered onto it and blanking plates (not supplied) put on either side to seal the window for maximum cooling.
This air conditioner has thermostatic control so will switch itself on and off depending on the ambient internal temperature.
Most models have two speeds of cooling and two speeds of fan only operation apart from the larger cool only models which have three. A vent door in the system also allows it to be used for ventilation without cooling. However, when cooling is desired the vent door should be closed to decrease the amount of air exchanges within the room and ensure the cool air stays inside.
These units are popular in conservatories as they can be installed through the supporting brickwork around the bottom of the conservatory.
The installation of this unit through a wall will need to be handled by someone competent in DIY as it will involved creating a hole through an external wall large enough to fit the entire unit.
This unit uses the compression and expansion of refrigerant to create a cold cooling coil on the inside of the room and a hot coil on the outside. The fans blow air over the coils to improve their ability to dissipate cold air to the room being cooled and heat to the outside air.
If you take the cover off of an unplugged window unit, you will find that it contains: