When it comes to choosing an air conditioner, performance, brand and price are crucial. But where the air conditioner is placed in the home is just as important for comfort and efficiency. A poorly placed unit, although modern and energy efficient, can easily cause draughts, uneven cooling or even unnecessarily high electricity bills.
In this guide, we go through the most important aspects: where to install air conditioning, where not to install it, what rules to follow and the most common mistakes you will encounter in practice.
Why does it matter where the air conditioner goes?
Positioning the air conditioner is not a question of aesthetics, but simple physics. Air movement, temperature differences and room conditions all affect how the system will work. A well-chosen place for the climate:
- cools the room evenly
- does not cause unpleasant draughts
- work more efficiently (less energy use)
- quieter and more comfortable operation
In contrast, the consequences of poor placement are felt from the first use:
- cold air flows directly onto the body
- part of the room remains too cold, while other parts remain warm
- the equipment is constantly „overworked”
- energy consumption increases
- deteriorating overall comfort
Basic principles for air conditioner installation
Although every home is different, there are some general rules that apply in almost all cases. By following them from the outset, the efficiency of the system can be significantly improved.
Free flow of air is key
Air conditioning can only work effectively if the blown air can circulate freely in the room. This means that:
- do not place above cupboards or high furniture
- not be „backed into a corner”
- do not cover curtains or decorations
We've often heard requests to „hide” the air conditioner for aesthetic reasons, but we never recommend this, as it is at the expense of performance.
Do not blow directly on the person
One of the most common mistakes is to blow the air conditioner directly onto the sofa, bed or desk. This is uncomfortable in the short term and can lead to health problems (e.g. arthritis, colds) in the longer term. The following placements should be avoided:
- directly above the sofa
- over the bed or at the end of the bed
- above the desk
The aim is to get the air flowing into the space, not directly at you.
High, but not too high
Indoor units are usually mounted on the top of the wall. The ideal placement is in the upper third of the wall, at a suitable distance from the ceiling, and of course on a stable, load-bearing wall. An air conditioner placed too high may be less efficient and the uniformity of cooling may be reduced.
The „central” point of the room is the best choice
Good positioning tends to focus on the central air space of the room, taking into account the layout of the furniture and supporting the natural air flow. A well-placed air conditioner does not need to be constantly adjusted, yet maintains a comfortable temperature.
Air conditioning in different rooms
Not all rooms work in the same way, so it's worth looking at what to look out for in each space.
Living room - the most common installation location
The living room is usually the largest and most frequently used room, so it's particularly important to get it right.
Frequently asked question: can the air conditioner be placed above the sofa?
The answer is: it is rarely ideal. If the air conditioning blows directly onto the sofa, it becomes uncomfortable for longer stays.
There may be a better solution:
- the wall opposite the sofa
- lateral positioning
- a position from which the air „bypasses” the seating
The area around the TV is also a common choice, but care should be taken to ensure that the air is not directed at the viewers.
Bedrooms - comfort is key
The primary goal in the bedroom is to sleep soundly and without draughts. Therefore, precise positioning is even more important.
What to avoid:
- over-bed air conditioning
- air blowing close to the bed
Better solutions:
- the wall opposite the bed
- lateral positioning
A well-placed air conditioner works almost unnoticed at night: it doesn't bother you, it just keeps you comfortable.
Kitchen and dining room - special environment
The placement of the air conditioning in the kitchen is also influenced by the heat sources and air quality. Important considerations:
- do not place directly above the stove
- the device is not placed the most humid air
In the dining room, it's the same as in the living room - the aim is comfort and even cooling.
Cooling multiple rooms with one air conditioner - does it work?
Many people want to cool several rooms with a single air conditioner. This can work in some cases, but with limited efficiency. Open doors, good airflow, and proper placement close to the circulation area are essential for operation. In practice, this is a compromise solution for larger dwellings. If real comfort is the goal, often a better choice is multiple indoor units or a multi split system.
Typical mistakes in air conditioning installation
The following errors are very common and in almost all cases they make the system work worse:
- aesthetics override functionality
- they do not take into account the conditions of the room
- poorly chosen power
- inadequate piping facilities
If you choose the wrong professional to install it, these faults will become apparent afterwards, when you start to feel the inconvenience during use.
What about the outdoor unit?
Although the focus of this article is on the indoor unit, the placement of the outdoor unit also has an impact on the operation of the system. Optimising the length of the pipe is an important consideration, as the two units together form a system, and the placement design needs to be considered as a complex issue. Placement of the outdoor unit we wrote more here >>
Why is it important to choose the right professional?
Air conditioning is not just „installation”. It's actually a design exercise where you have to take into account the layout, orientation, furnishings and usage patterns. An experienced professional see them together and propose a solution that works in the long term.
Summary - how to get the right air conditioning
If I had to summarise briefly, the following rules are worth noting:
- air can circulate freely
- do not blow directly at the person
- targeting the central air space of the room
- adapt to the furnishing and use
- aesthetics should not be the primary consideration
These principles can be applied to almost any home and will significantly improve comfort.
If you want to be sure...
The reality is that no two homes are the same. What works in one place may not work in another.
At SMARTAIR, we always consider an on-site survey. We recommend the equipment in the light of the overall environment and propose a placement that allows a truly comfortable operation and is energy efficient.
If you're planning to install an air conditioner now, it's a decision not to rush into, as the right placement will determine how the system works in your everyday life.