Living in a penthouse has many advantages: more natural light, better views and, in many cases, a spacious terrace. However, it also has one important drawback during the warmer months: it usually reaches higher temperatures than other properties in the same building.
Direct sun exposure on the roof, large windows and heat building up throughout the day mean that cooling a penthouse requires a little more planning.
That is why choosing the right air conditioning system is not simply a matter of buying a powerful unit. You also need to consider the size of the property, insulation, orientation, layout and the number of hours of direct sun exposure.
Why does a penthouse need special consideration when it comes to air conditioning?
Penthouses are usually exposed to more solar radiation than properties located on intermediate floors.
The roof can absorb heat for many hours and transfer it indoors even after the sun starts to go down. In addition, if the property has large terraces or windows facing south or west, the heat load can increase considerably.
This means that two homes with the same floor area may require different air conditioning systems if one of them is located on the top floor.
How much air conditioning capacity does a penthouse need?
The required capacity depends on several factors.
The number of square metres is important, but it should not be the only criterion. It is also necessary to consider:
- The orientation of the property.
- The insulation of the roof and walls.
- The size and type of windows.
- The number of hours of direct sunlight.
- The ceiling height.
- The number of people who regularly use the property.
- Appliances and other heat sources.
- The layout of the rooms.
In a particularly sunny penthouse, it may be necessary to install a system with slightly more capacity than you would choose for a similarly sized property on a lower floor.
However, it is also important not to oversize the system unnecessarily. A proper heat-load calculation helps find the right balance between performance, energy consumption and comfort.
Split, multi-split or ducted air conditioning: which should you choose?
The best option will mainly depend on the layout of the property.
Split air conditioning
A split system may be enough to cool a living room, bedroom or small open-plan apartment.
It is a common solution when you only need to cool one specific room and usually offers a good balance between cost, efficiency and ease of installation.
In a penthouse, choosing the correct capacity and the right location for the indoor unit is especially important to ensure good air distribution.
Multi-split system
If you want to cool several rooms independently, a multi-split system can be a good alternative.
This type of system allows several indoor units to be connected to a single outdoor unit.
For example, one unit can be installed in the living room and another in one or more bedrooms, allowing the temperature in each room to be controlled separately.
Ducted air conditioning
In larger properties with several rooms and sufficient ceiling space, ducted air conditioning can provide more even cooling throughout the home.
Air is distributed through ducts and vents installed in different areas of the property.
As well as offering a discreet finish, it can be a particularly comfortable option when you want to cool most or all of the home.
Energy efficiency is especially important in a penthouse
In a property with high sun exposure, the air conditioning may need to run for many hours during summer.
That is why choosing an efficient system can make a significant difference to electricity consumption.
Units with inverter technology automatically adjust compressor output according to cooling demand, avoiding constant switching on and off.
It is also worth checking the energy rating and efficiency values of the unit before making a decision.
A correctly sized and efficient system can maintain a comfortable temperature while using less energy.
The location of the indoor unit also matters
The power of the system will not help much if the cool air is not distributed properly.
The indoor unit should be installed in a position that allows the airflow to reach as much of the room as possible without being obstructed.
It is best to avoid placing it:
- Directly above sofas or beds.
- Behind tall furniture.
- In corners with poor air circulation.
- Opposite walls that are too close.
- In areas where the cold air blows directly onto people.
In open-plan living areas, a well-positioned indoor unit can even help cool nearby connected spaces.
Where should the outdoor unit be installed in a penthouse?
Penthouses may offer several options for installing the outdoor unit, especially when they have a terrace.
However, it should not simply be placed in any available corner.
The unit needs adequate ventilation so that it can release heat efficiently. Installing it in a confined space or placing objects too close to it can reduce performance.
It is also important to consider:
- Direct sun exposure.
- Available ventilation.
- Accessibility for future maintenance.
- Noise.
- The maximum recommended distance between the indoor and outdoor units.
- Community or building regulations where applicable.
A well-planned installation makes both operation and future maintenance easier.
Improving insulation can reduce energy consumption
Before increasing the air conditioning capacity, it is also worth checking whether too much heat is entering the property from outside.
Improving certain elements can significantly reduce the heat load in a penthouse.
For example:
- Install awnings or other forms of solar shading.
- Use shutters or blinds during the hottest hours of the day.
- Improve roof insulation.
- Install windows with better thermal insulation.
- Use suitable curtains or blinds.
- Reduce the amount of hot air entering the property.
The less heat that enters the home, the less work the air conditioning system needs to do.
Common mistakes when installing air conditioning in a penthouse
One of the most common mistakes is choosing a system based only on the number of square metres.
Other frequent mistakes include:
- Installing a system with insufficient capacity for the actual heat load.
- Choosing an excessively powerful unit assuming it will cool better.
- Ignoring the orientation of the property.
- Installing the indoor units in the wrong locations.
- Placing the outdoor unit in an area with poor ventilation.
- Trying to cool several closed rooms with a single split unit.
- Failing to consider roof insulation.
- Choosing a system based only on price.
A good installation always starts with an assessment of the property.
What is the best air conditioning system for a penthouse?
There is no single answer.
For a small, open-plan penthouse, a correctly sized split system may be enough.
For properties with several rooms, a multi-split system allows each area to be cooled independently.
And in larger penthouses where you want even cooling throughout the property, a ducted system may be an especially comfortable option.
The key is to size the installation correctly and choose the system according to the layout and the actual thermal conditions of the property.
Air conditioning for penthouses in Torrevieja
In Torrevieja and other areas of the Costa Blanca, high summer temperatures and strong sun exposure make it particularly important to size a penthouse air conditioning system correctly.
At AC Torrevieja, we assess the characteristics of each property to recommend the most suitable capacity, system type and installation location.
If you are considering installing or replacing the air conditioning in your penthouse, a professional assessment can help you improve comfort, reduce electricity consumption and avoid performance problems during the hottest months.