Summer heat can make an apartment uncomfortably hot, especially if the windows face south or the building is well-insulated. In such a situation, a portable air conditioner is one of the fastest and most affordable ways to cool a room without complicated installation or an outdoor unit.
Why Choose a Portable Air Conditioner for Your Apartment?
Many apartment owners and tenants cannot install a stationary split-system air conditioner because:
- The apartment association does not allow outdoor units,
- The facade must not be altered,
- This is a rental apartment,
- Installation would be too expensive.
A portable air conditioner requires only an exhaust hose and a window seal, which allows the unit to be set up quickly.
How powerful should a portable air conditioner be?
The most common mistake is buying a device that isn’t powerful enough.
General recommendation:
| Room size | Recommended cooling capacity |
|---|---|
| up to 20 m² | 2.0–2.6 kW |
| 20–35 m² | 2.6–3.5 kW |
| 35–50 m² | 3.5–4.5 kW |
| over 50 m² | 4.5–5.5 kW |
The following must also be taken into account:
- the size of the windows,
- sunside,
- ceiling height,
- the number of people in the room,
- among electronic devices.
Does a larger air conditioner use more electricity?
Not necessarily.
To cool a room, a certain amount of heat must be removed. If the unit is too weak, it will run at full capacity for a long time. A more powerful unit will reach the desired temperature faster and can then operate at a lower load.
In practice, the energy consumption for cooling the same apartment can be very similar, regardless of whether a smaller or larger air conditioner is used. The difference lies in operating time and ease of use.
Why use a window seal?
The efficiency of a portable air conditioner depends largely on how well the exhaust hose is sealed against the window.
Without a window seal:
- hot air flows back into the room,
- the cooling capacity decreases,
- Electricity costs are rising.
A window seal helps keep cool air inside the room and significantly improves the unit’s efficiency.
How much electricity does a portable air conditioner use?
An average portable air conditioner consumes:
- 0.8–1.6 kWh per hour.
If the total price of electricity is 0.18 €/kWh, the operating cost is usually:
- Between 1 and 3 euros a day,
- depending on the device’s power and usage time.
Portable air conditioner or split-system air conditioner?
Advantages of a portable air conditioner:
- easy to install,
- does not require an external device,
- is suitable for a rental apartment,
- can be moved from one room to another.
Advantages of a split-system air conditioner:
- quieter operation,
- higher efficiency,
- lower noise level.
If it is not possible to install a stationary unit, a high-quality portable air conditioner is an excellent solution for an apartment.
What characteristics are important?
When choosing a device, it’s worth paying attention to:
- cooling capacity,
- noise level,
- energy class,
- For WiFi control,
- to the timer,
- moisture removal capacity.
In addition to cooling, many modern models also function as fans and dehumidifiers.
Summary
A portable air conditioner is an excellent solution for an apartment where it is not possible to install a stationary air conditioning unit. The most important thing is to choose a unit with the right capacity for the size of the room and to use a high-quality window seal.
The right device ensures:
- a pleasant indoor climate,
- lower electricity costs,
- rapid cooling,
- better sleep and working conditions, even on the hottest summer days.
Frequently Asked Questions (FAQ)
Is a portable air conditioner suitable for an apartment?
Yes. This is one of the most popular cooling solutions for apartments where it is not possible to install an outdoor unit.
What size portable air conditioner should I choose for a 30 m² apartment?
In most cases, a unit with a cooling capacity of 2.6–3.5 kW is suitable.
Does a portable air conditioner make a lot of noise?
The noise level depends on the model. Modern devices are significantly quieter than older models.
Is a window seal necessary?
Yes. Window seals improve cooling efficiency and help reduce electricity costs.
Does a portable air conditioner dry the air?
Yes. During the cooling process, the air conditioner also removes excess moisture from the air.
