Air-to-air heat pump
Air conditioning with a heating function is an air-to-air heat pump. From one kilowatt-hour of electricity it delivers several times as much heat. Exactly how much depends on the model and the outdoor temperature.
How air conditioning works
Air conditioning doesn't produce heat, it moves it. That's why it cools in summer and heats in winter.
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How it works
Air conditioning doesn't produce heat, it moves it. In summer it carries heat out of the room; in winter it takes heat from the outdoor air and brings it inside.
The indoor unit absorbs heat from the room air. The refrigerant carries it outside through the pipes, and the outdoor unit releases it into the surroundings.
The outdoor unit takes heat even from cold outdoor air. The refrigerant carries it inside, and the indoor unit warms the room.
Inverter
The compressor doesn't switch fully on and off. It raises and lowers its output smoothly, so it holds the temperature, saves energy and runs more quietly.
Split or multi-split?
Split: one outdoor and one indoor unit. Multi-split: we connect two to five indoor units to one outdoor unit, and each room has its own temperature.
Unit types and mounting
We choose the indoor unit to suit the room, and place the outdoor unit where it will be safe, quiet and easy to reach for servicing.
Illustrative photoIndoor unitWall-mounted
When it suits: The most common choice for flats, bedrooms and offices.
- DiagramIndoor unit
Floor-standing
When it suits: Under a window or in an attic room where there's no space higher up.
Illustrative photoIndoor unitCassette
When it suits: In a suspended ceiling in an office or shop, blowing in four directions.
Illustrative photoIndoor unitDucted
When it suits: Hidden in the ceiling void, only the grilles are visible in the room.
Illustrative photoOutdoor unitOn the façade
When it suits: On a wall bracket, when the façade is accessible and the unit bothers no one.
Illustrative photoOutdoor unitOn a balcony
When it suits: On a balcony or loggia in a block of flats, often without scaffolding.
Illustrative photoOutdoor unitOn the roof
When it suits: On a flat roof, out of sight and with good airflow.
Illustrative photoOutdoor unitOn the ground
When it suits: On a base next to the house, easy to reach for servicing.
- DiagramPipe run
Concealed pipe run
When it suits: We run the pipework in the wall or in trunking, ideally during a renovation.
Frequently asked questions
Can air conditioning heat in winter too?
Yes. Air conditioning with a heating function is an air-to-air heat pump, and it heats even when it's freezing. Down to what outdoor temperature and at what output depends on the model. At the site survey we'll recommend a unit that can handle it.
Will it blow at me?
We position the unit so the airflow isn't aimed at a bed, sofa or desk. You can also set the direction and speed of the air on the remote control.
How noisy is it?
At low output the indoor unit is very quiet; in a bedroom you usually won't hear it at all. We position the outdoor unit so it doesn't disturb you or your neighbours.
Where does the condensate go?
Water from the indoor unit drains through a small hose outside or into a waste pipe. Where it can't drain by gravity, we use a small condensate pump. We'll propose a solution at the site survey.
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Tell us what you need and add photos if you like. We will get back to you within 24 hours.