Find the best air conditioner: Cool your home smartly and energy-efficiently

Summers in Germany are getting hotter and hotter, increasing the desire for a cool retreat within one's own four walls. But which air conditioner is the right one? Whether you want to cool an entire apartment or just a bedroom – the selection between split air conditioners , portable air conditioners and efficient monoblock units is vast.

This guide will help you find the optimal solution that meets your requirements for cooling performance, noise level, and energy efficiency .

Air conditioner types compared: Split, portable or monoblock?

Choosing the right type of appliance is crucial for comfort and efficiency. Here are the key differences:

Long-tail keyword integration: Are you looking for a quiet split air conditioner for the bedroom or a portable air conditioner without an exhaust hose ? (The latter is often technically just an air cooler!)

What matters when buying? The most important key figures.

Once you've decided on a type, pay attention to these key features:

• Cooling capacity (in kW or BTU): The capacity must be appropriate for the room size. A rule of thumb is approximately 35 watts per cubic meter (m³) of living space. An underpowered unit will run constantly and inefficiently.

• Energy efficiency class: Look for A++ or A+++. An efficient split air conditioner (often using the environmentally friendly refrigerant R32 ) saves on electricity costs in the long run.

• Sound pressure level (in dB(A)): This value is crucial, especially in the bedroom. Good split systems reach only 19–20 dB(A) in quiet mode – barely audible.

Test winner 2024/2025: These air conditioners impress

Independent tests, such as those conducted by Stiftung Warentest, provide valuable guidance. Current test winners and frequently recommended brands in the split air conditioner segment include models like the Daikin Perfera and the Samsung Wind-Free Elite , which regularly achieve top marks in cooling performance and efficiency.

• Tip: When choosing a mobile device, make sure it has an energy efficiency rating of A , as these devices naturally consume more electricity than fixed installations.

The unbeatable benefits of an air conditioner for your health

An air conditioner not only provides comfort, but also actively protects your health and productivity.

1. Better sleep: A comfortable room temperature (ideally 23–26 °C) is crucial for restful sleep. Heat stress is eliminated.

2. Improved air quality: Modern devices filter pollen, dust, and allergens from the air. A great benefit for allergy sufferers!

3. Increased productivity: Studies show that concentration and work performance (especially in the home office) increase significantly at optimal temperatures.

4. Dehumidification: Air conditioners lower the humidity, which further improves the indoor climate and prevents mold growth.

Installation and maintenance: What you need to know

• Split unit installation: In Germany, the installation and commissioning of split air conditioning units (permanently installed systems) must be carried out by certified specialist companies, as they contain refrigerants. This ensures safety and compliance with regulations.

• Maintenance: Regular cleaning of the filters (which can be done yourself) and annual maintenance by a professional (especially for split systems) ensure performance and energy efficiency for years to come.

• The environmental aspect: Pay attention to the refrigerant R32 (lower Global Warming Potential) and switch off the device when you are away for extended periods to reduce electricity consumption.

Investing in a good climate pays off.

Whether you opt for an efficient split system or a flexible portable air conditioner , investing in a comfortable indoor climate quickly pays off through improved quality of life, better health, and increased productivity. Carefully research cooling capacity and choose units with a good energy efficiency rating (A+++).