A monoblock air conditioner is a self-contained air conditioner in which all components are integrated into a single housing and which connects to the outside air for intake and exhaust via two holes in the wall. Unlike split systems, a monoblock does not require an external unit, making installation simpler and requiring less maintenance.

Why does an incorrect installation cause high energy costs?

A poorly installed monoblock air conditioner can significantly increase your energy bill due to air leaks around the wall penetrations. When the holes are not perfectly drilled or sealed, heat exchange occurs between the inside and the outside. This means your air conditioner has to work harder to reach the desired temperature, which can result in 20-30% higher energy costs. The solution lies in professional installation with precision-drilled holes and high-quality sealing that completely prevents air leaks.

How does choosing the wrong wall affect the performance of your air conditioner?

Choosing the right wall for your monoblock air conditioner largely determines how effectively the system works. Installation in a thin partition wall or in a location with a lot of sunlight causes heat transfer that drastically reduces cooling performance. Your air conditioner will then have to run constantly without ever reaching the desired temperature. Therefore, always choose an exterior wall of sufficient thickness, preferably facing north or east, where the heat load is lowest.

What is a monoblock air conditioner and how does it differ from other systems?

A monoblock air conditioner is a complete air conditioning system in which all components—compressor, evaporator, condenser, and fan—are housed in a single casing. The system operates via two hoses that lead through the wall to the outside: one for the supply of cool outside air and one for the exhaust of warm air.

The major difference compared to split systems lies in the simplicity of the installation. Whereas a split air conditioner requires an outdoor unit connected to the indoor unit via refrigerant lines, a monoblock air conditioner only requires two holes in the wall. This makes installation faster and cheaper, especially since no specialized refrigeration technician is needed to fill the refrigerant lines.

Other advantages over traditional systems are:

No risk of refrigerant leakage in cooling lines
Easier maintenance because all parts are accessible
More flexible placement within the space
Suitable for rental homes due to less invasive installation

How does the cooling process of a monoblock air conditioner work?

The cooling process of a monoblock air conditioner begins with drawing in warm indoor air via the evaporator. Here, the refrigerant evaporates due to heat absorption, causing the air to cool down. This cooled air is then blown into the room via the system's fan.

At the same time, the air conditioner draws in cool outside air through the first hose, which flows over the condenser. Here, the heated refrigerant condenses back into a liquid and releases heat to the outside air. This heated air is vented outside through the second hose, permanently removing the heat from the home.

The compressor ensures the circulation of the refrigerant through the system and creates the pressure changes necessary for the evaporation and condensation process. A built-in thermostat controls when the system switches on and off based on the desired temperature.

What are the advantages and disadvantages of a monoblock air conditioner?

The main advantages of a monoblock air conditioner make it an attractive choice for many situations:

Eenvoudige installation: Just drill two holes in the wall, no complex cooling pipes
Lower installation costs: No specialized refrigeration technician needed
Flexible placement: Can be easily moved within the room
Suitable for rental homes: Less invasive installation than split systems
Maintenance-free: All parts are accessible for cleaning.

However, there are also some disadvantages to consider. Monoblock air conditioners are generally less energy-efficient than split systems because they lose more energy through the air ducts. They also produce more noise because all mechanical parts are located in the room. For large rooms exceeding 40 square meters, the cooling capacity is often insufficient, and the system operates less effectively at extreme outdoor temperatures.

How do you install a monoblock air conditioner and what do you need?

The installation of a monoblock air conditioner requires precision work, especially when drilling the wall penetrations. You need two holes with a diameter between 160 and 200 millimeters, depending on the model of your air conditioner.

For a successful installation, these steps are essential:

Determine location: Choose an exterior wall with sufficient thickness, preferably facing north or east.
Drilling holes: Use diamond core drills for a clean finish without cracks.
Dust control: Always work with dust extraction to prevent contamination.
Install seal: Install facade grilles and ensure perfect airtightness
Connecting the air conditioner: Connect the air hoses and test the system.

For concrete walls, water-cooled drilling is necessary to prevent overheating of the drill bit. For stone walls, dry drilling with powerful dust extraction is sufficient. The air conditioning installation requires precision because even small irregularities can lead to air leaks that drastically reduce efficiency.

How much electricity does a monoblock air conditioner consume and what does it cost?

The power consumption of a monoblock air conditioner depends on the cooling capacity and the energy label of the unit. An average monoblock air conditioner with a cooling capacity of 2,5 kW consumes approximately 1,0 to 1,2 kW per hour at full power. With current electricity prices of approximately €0,40 per kWh, this means €0,40 to €0,48 per operating hour.

In practice, an air conditioner does not run continuously at full power. Thanks to thermostat control, the system switches off automatically when the desired temperature is reached. On average, a well-sized air conditioner runs for approximately 6-8 hours per day during warm periods, resulting in daily costs of €2,40 to €3,84.

You can optimize consumption by:

To set the temperature no more than 6-7 degrees below the outside temperature
Use curtains or blinds to block direct sunlight
Keep doors and windows closed during use
Clean the filters regularly for optimal airflow

How De Betonboorder helps with monoblock air conditioning installation

We ensure a professional installation of your monoblock air conditioner using precision-drilled wall penetrations that fit perfectly and prevent air leaks. Our approach guarantees optimal performance of your air conditioner:

Diamond drills: We use high-quality diamond core drills for clean holes without cracks or damage.
Dust-free working: With powerful dust extraction, we keep your home clean during the work.
Water-cooled drilling: For concrete walls, we provide perfect cooling to prevent overheating.
Professional finish: Facade grilles are expertly installed for a neat exterior.
Quick service: We can usually arrange a professional within two days.

Please touch with Join us for a professional installation that maximizes the lifespan and efficiency of your monoblock air conditioner.

How does a monoblock air conditioner work?