June 18, 2025, 1:07 pm | Read time: 5 minutes
Split air conditioners provide efficient cooling, making them ideal for summer. However, they can also be used for heating. But which system suits your space and needs? Below, you’ll learn about the key differences between types of air conditioners and which models are worth considering.
Whether it’s a heatwave in summer or frosty days in winter–a split air conditioner reliably ensures comfortable room temperatures. However, not every model suits every living situation or requirement. This buying guide shows what really matters when choosing. An overview of five models from different brands is provided.
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Overview
What to Consider When Buying a Split Air Conditioner
Split air conditioners consist of an indoor unit and an external outdoor unit connected by refrigerant lines. They are suitable for rooms starting at about 20 square meters and usually offer heating in addition to cooling. When purchasing, energy efficiency, noise levels, control options, and room size are crucial. Comfort features such as timers, sleep mode, or air filter technology should also be considered. Installation typically requires a professional, especially if there is no Quick-Connect solution. The choice of the right device depends on room size, energy consumption, and desired additional features.
Difference from Other Systems
In addition to the classic split variant, there are so-called multi-split air conditioners. Here, one outdoor unit is combined with several indoor units, allowing multiple rooms to be air-conditioned simultaneously. Each indoor unit can be controlled individually, making the multi-split system particularly flexible. However, the installation effort is higher, and the acquisition costs exceed those of a single unit.
In contrast, there are mobile air conditioners that do not require an outdoor unit. They contain all components in a compact device, usually with an exhaust hose that must be led out of the window. Mobile units are significantly cheaper and ready for immediate use, but they are louder and much less efficient. They are mainly suitable for occasional use in individual rooms.
Also read: The Best Mobile Air Conditioners for Hot Summer Days
Advantages and Disadvantages of Split Air Conditioners
Split air conditioners offer year-round use with integrated heating and cooling functions and generally operate quieter and more efficiently than mobile air conditioners. Their biggest advantage is high energy efficiency–especially in models with inverter technology. Comfort features such as app control and air purification systems also speak for this solution. On the downside, there are higher acquisition costs and a more complex installation process. Additionally, a professional is required for the commissioning of many models. Nevertheless, they are often more economical in the long run than mobile alternatives when used frequently.
The Best Split Models
Kältebringer Split Air Conditioner Quick Connect
With a cooling capacity of 12,000 BTU (3.5 kW), this model is suitable for rooms up to 55 square meters. The integrated WiFi module allows control via app, Alexa, or Google Assistant. The device achieves energy efficiency class A++ for cooling and A+ for heating. The Quick-Connect system eliminates manual vacuuming, simplifying installation. The titanium-gold coating protects the heat exchanger, while a noise level starting at 19 decibels ensures quiet operation. Additionally, a complete set with a five-meter line is included.
Bosch Climate 3000i
This single-split system is designed for rooms up to 40 square meters and offers heating and cooling functions with energy efficiency A++/A+. The air conditioner can optionally be controlled via WiFi through an app. Comfort features include the Wind-Avoid-me mode, an i-Clean cleaning system, and sleep mode. The Follow-Me mode measures the temperature at the remote control, not at the ceiling unit, for more precise regulation. A 1-watt standby mode for energy saving is also integrated.
Samsung Cebu
The complete set with indoor and outdoor units is suitable for rooms up to 25 square meters. It combines cooling, heating, dehumidifying, and ventilation. Control is possible via app, voice command, or remote control. With the Eco-Inverter, the system operates quietly and energy-efficiently. The full-HD filter cleans the air of dust and allergens. Auto-restart after a power failure, the Good Sleep Mode, and automatic switching between heating and cooling increase comfort.
Midea Xtreme Save Lite
This model is designed for rooms up to 40 square meters and stands out as a budget-friendly entry-level device. It offers cooling and heating functions with inverter technology and a particularly quiet sleep mode at 20 decibels. The iEco function allows energy savings of up to 60 percent. Other features include automatic self-cleaning, Follow-Me function, and a frost protection mode. The system is optionally available with Quick-Connect, making it easy to install.
Daikin Perfera FTXM25R
The Daikin unit is suitable for smaller rooms and operates with a noise level of only 19 decibels indoors. A motion sensor reduces energy consumption by automatically switching to energy-saving mode. Control via an optional WiFi controller also allows remote access. This device is particularly aimed at users with high demands for energy efficiency and quiet operation.
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Frequently Asked Questions (FAQ)
What is a split air conditioner?
A split air conditioner consists of an indoor and an outdoor unit. It enables effective room cooling and heating.
How large can the room be?
Depending on the capacity, split air conditioners are suitable for room sizes between 20 and 55 square meters. The capacity should be matched to the room size.
How loud are these devices?
Good models operate with a sound pressure level starting at about 19 decibels (indoors), which is very quiet and allows use in the bedroom.
What energy efficiency is recommended?
A device with at least A++ for cooling and A+ for heating is considered efficient. A+++ offers maximum savings but is often more expensive.
Can I install the air conditioner myself?
Only devices with a Quick-Connect system are easier to install by oneself. In most cases, a professional is necessary.
Are there funding opportunities?
Depending on the region and country, there may be funding programs for energy-efficient climate solutions. It is worth obtaining information from the local energy advisory service before purchasing.