More and more households and companies are choosing a multi-split air conditioner to efficiently cool and heat their rooms. At New Heating we offer energy-efficient solutions that can be easily integrated into existing homes or offices.
Unlike traditional air conditioners with multiple outdoor units, a multi-split system uses just one outdoor unit to which multiple indoor units are connected. This saves space, energy, and money, while allowing each room to be controlled independently.
What is a Multi Split Air Conditioner?
A multi-split air conditioner consists of a single outdoor unit connected to several indoor units. For more information about our various air conditioning systems, please visit our product page.
This allows you to cool or heat different rooms in your home or office separately. Unlike a single split air conditioner , which has only one indoor unit per outdoor unit, a multi-split system offers much greater flexibility and efficiency.
How does it work?
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Outdoor unit: The outdoor unit contains the compressor and condenser. This controls the cooling process and transports the refrigerant.
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Indoor units: Each indoor unit (wall-mounted, floor-standing, or cassette) can be set independently, allowing you to control the temperature in each room.
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Connection: The units are connected to each other via pipes for refrigerant, electricity and condensate water.
Practical example
Suppose you want to air-condition a living room, bedroom, and home office . With a multi-split system, you only need one outdoor unit, which is connected to three indoor units. This saves space, installation costs, and energy.
Important difference with single split
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Single split: 1 outdoor unit ↔ 1 indoor unit.
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Multi split: 1 outdoor unit ↔ 2 to 5 (or even 8) indoor units.
This makes the multi-split air conditioner ideal for homes and businesses where multiple rooms need to be conditioned efficiently.
Benefits of a Multi Split Air Conditioner
Thanks to modern inverter technology, a multi-split system consumes less energy. Discover all ourheat pump air conditioners for an optimal combination of cooling and heating.
Below you will find the most important advantages:
1. Space saving
With just one outdoor unit, you can cool or heat multiple rooms. This saves a lot of space in the garden, on the roof, or on the facade compared to multiple single split systems.
2. Independent temperature control per room
Each indoor unit can be controlled independently. This means you can keep the bedroom nice and cool in the summer, while heating the living room only when necessary.
3. Quiet and comfortable
The outdoor unit operates whisper-quietly, and most indoor units have a silent mode. This makes them ideal for bedrooms, offices, and living areas.
4. Energy efficient
Multi-split systems are very energy-efficient. Because the temperature can be adjusted for each room, energy is never wasted unnecessarily. They often have an A++ or A+++ energy rating.
5. Flexibility in design
You can combine different types of indoor units: wall-mounted, floor-standing, or cassette models for ceiling installation. This makes the system suitable for any room and interior style.
6. Cooling and heating
A multi-split air conditioner is essentially an air-to-air heat pump. This means the system can cool in the summer and heat in the winter. This makes it a versatile and future-proof investment.
7. Sustainable and environmentally friendly
Thanks to modern refrigerants (such as R32) and their high efficiency, multi-split air conditioners contribute to lower CO₂ emissions.
Disadvantages and Points of Attention of a Multi Split Air Conditioner
While a multi-split air conditioner offers many advantages, there are also some disadvantages and things to consider:
1. Higher purchase costs
The investment for a multi-split air conditioner is higher than that of a single-split system. This is due to the more complex technology and the ability to connect multiple indoor units.
2. More complex installation
Because multiple indoor units must be connected to a single outdoor unit, installation requires more time and expertise. This can lead to higher installation costs.
3. Limited number of connections
Depending on the brand and type of outdoor unit, you can often connect 2 to 5 indoor units. If you have more rooms, a multi-split system may not be sufficient, and you should consider a VRF/VRV system.
4. Distribution of assets
The total capacity of the outdoor unit must be distributed across all connected indoor units. This means that if all rooms are used intensively simultaneously, performance may decrease slightly.
5. Maintenance required
As with other air conditioners, regular maintenance is important. Filters need to be cleaned, and the system needs to be inspected periodically to remain efficient.
6. Restrictions on placement of the outdoor unit
Because multiple indoor units rely on a single outdoor unit, it must be strategically placed to efficiently route piping to all indoor areas.
Price and Costs of a Multi Split Air Conditioner
The cost of a multi-split air conditioner depends on several factors, such as the number of indoor units, the capacity, and installation. Below is an overview:
1. Purchase costs
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Outdoor unit : from €1,500 – €3,500, depending on brand and capacity.
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Indoor units : average €600 – €1,200 per unit.
2. Installation costs
Installation costs range from €1,500 to €3,000 , depending on the complexity, distance between the indoor and outdoor unit, and the number of rooms.
3. Total costs
For a complete installation with, for example, 3 indoor units, you should count on an investment between €4,000 and €7,000 .
4. Maintenance costs
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Annual maintenance costs on average €100 – €250 per system.
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This ensures a longer lifespan and maintenance of efficiency.
5. Energy consumption
A multi-split air conditioner with energy label A++ or A+++ can be up to 30-40% more efficient than older models, reducing your monthly costs.
6. Subsidies and benefits
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There is generally no ISDE subsidy for regular air conditioning in the Netherlands .
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If the multi-split air conditioner can also heat (heat pump function), this may be eligible for a subsidy in some cases .
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In addition, there are often VAT benefits for business users.
Installation of a Multi Split Air Conditioner
Installing a multi-split air conditioner is a technical process that must always be carried out by a certified installer . This not only guarantees safety, but also efficiency and warranty.
1. Placement of the outdoor unit
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Usually placed on the facade, on the roof or in the garden.
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Important: Sufficient ventilation space and a solid base to limit vibrations and noise.
2. Placement of the indoor units
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Strategically chosen locations in bedrooms, living room, office or other spaces.
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The air flow should be optimal and not directed directly at the bed or workstation.
3. Pipes and connections
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Refrigerant piping and electrical wiring connect the outdoor unit to the indoor units.
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Pipes are neatly concealed in coves or in the wall.
4. Condensate drainage
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Each indoor unit has a condensate drain that must be properly connected to prevent leaks.
5. Commissioning and testing
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After installation, the technician will test whether the system is working correctly.
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Checking of refrigerant, air pressure, temperature and energy measurement.
6. Installation time
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Depending on the number of indoor units, installation takes on average 1 to 3 days .
7. Permit and regulations
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A permit is usually not required for private individuals.
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Installation must comply with F-gas regulations : only certified installers may work with refrigerants.
Maintenance and Lifespan of a Multi Split Air Conditioner
A multi-split air conditioner lasts an average of 12 to 18 years , depending on the brand, installation, and maintenance. Proper and regular maintenance extends its lifespan and keeps it running smoothly.
1. Regular maintenance by user
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Clean filters : at least once a month, depending on use.
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Check condensation drain : prevent blockages to avoid leaks.
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Keep the indoor unit clean : remove dust from grilles and ventilation openings.
2. Professional maintenance
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Annual inspection by a certified mechanic.
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Checking refrigerant, pressure, pipes and electronic components.
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Cleaning the outdoor unit to maintain optimal air circulation.
3. Tips for a longer lifespan
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Do not unnecessarily set the air conditioning to the lowest temperature, this reduces wear and tear.
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Also run the air conditioning in ventilation mode occasionally to prevent mold formation.
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Keep the outdoor unit free of leaves, dust and dirt.
4. Maintenance contract
Many suppliers offer a maintenance contract , which includes annual inspections and repairs. This provides peace of mind and security.
5. Life expectancy
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Indoor units : 12–15 years with proper maintenance.
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Outdoor unit : 15–18 years thanks to more robust construction.
Multi Split Air Conditioning vs. Other Cooling Options
Compared to mono-split units or portable air conditioners, a multi-split system offers greater comfort and lower energy costs. View our mono-split air conditioners for an overview of alternatives.
When looking for the right solution for a comfortable indoor climate, you'll often encounter several options: mono-split air conditioners, portable air conditioners, and multi-split air conditioners . But which one best suits your situation? Below, you'll find a clear comparison.
1. Multi Split Air Conditioning
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Advantages :
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One outdoor unit for multiple indoor units (space-saving).
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Energy efficient thanks to inverter technology and R32 refrigerant.
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Individual temperature control per room.
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Whisper-quiet operation.
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Disadvantages:
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Higher purchase costs than a separate mono split.
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Installation requires a certified installer.
2. Mono Split Air Conditioning
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Advantages :
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Ideal for cooling or heating one room.
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Lower acquisition costs per unit.
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Easier installation process.
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Disadvantages :
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For multiple rooms, multiple outdoor units are also required.
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More outdoor units means higher energy costs and less aesthetics.
3. Mobile Air Conditioner
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Advantages:
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Cheapest solution to purchase.
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Portable and ready for immediate use, no installation required.
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Disadvantages :
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Less energy efficient, higher electricity costs.
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Noisy in use.
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Only suitable for smaller spaces.
Applications of Multi Split Air Conditioning
A multi-split air conditioner is highly versatile and can be used in a variety of situations . Because multiple indoor units can be connected to a single outdoor unit, this system is suitable for both residential and commercial spaces. Here are some common applications:
1. House & Apartment
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Bedrooms: Each room can be set individually, ideal for families with different temperature preferences.
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Living room: Ensures a pleasant temperature in the room where the family most often meets.
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Kitchen & Dining: Keep cooking areas cool without affecting other rooms.
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Apartments: Compact solution as only one outdoor unit is required, which is also aesthetically pleasing and practical for balconies or small outdoor spaces.
2. Office & Workplace
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Individual offices: Each workspace can be arranged separately, increasing comfort and productivity.
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Meeting rooms: Prevent overheating during meetings with flexible temperature settings.
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Open plan offices: Multiple units can ensure even temperature distribution.
3. Shops & Catering
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Shops and showrooms: Create a comfortable environment for customers and staff, without disturbing noise.
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Restaurants & Cafes: Keep dining areas cool in summer and warm in winter, while controlling different zones separately.
4. Other Applications
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Practices & salons: Think of dental practices, hair salons or beauty salons where customer comfort is paramount.
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Schools & Childcare: Energy-efficient climate control for classrooms and play areas.
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Renovation projects: Suitable for existing buildings thanks to the different types of indoor units (wall, floor, ceiling, duct).
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New construction projects: Easy to integrate into modern, energy-efficient homes or commercial buildings.
The versatility of a multi-split air conditioner makes it suitable for both residential and commercial applications . Whether it's an apartment, an office, or a retail space: with one outdoor unit and multiple indoor units, you can create the desired indoor climate anywhere.
How do you choose the right multi-split air conditioner?
Choosing the right multi-split air conditioner depends on several factors. Because every home or business is different, it's important to carefully determine which system best suits your needs and usage. Below are the most important points to consider:
1. Number of Rooms
Determine how many rooms you want to cool or heat. Multi-split systems can typically connect 2 to 8 indoor units to a single outdoor unit.
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Small house or apartment → often sufficient with 2–3 indoor units.
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Larger homes or offices → 4–8 indoor units for full coverage.
2. Required Power (kW/BTU)
The capacity of the air conditioner must match the size of the room.
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Small bedroom (up to 20 m²) → 2.0 – 2.5 kW.
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Living room (20 – 40 m²) → 3.5 – 5.0 kW.
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Large spaces or open plan offices → 5.0 kW or more.
Too low a power will result in insufficient cooling, too high a power will lead to unnecessary energy consumption.
3. Energy label
Always choose a system with a high energy rating (A++ or A+++) . This reduces energy costs and contributes to sustainability. Modern multi-split air conditioners often also function as heat pumps , allowing you to use them year-round.
4. Indoor Unit Type
Whether you choose a compact wall model or an elegant ceiling cassette model , we have a solution for every situation.
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Wall-mounted models → compact and popular for homes.
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Ceiling cassettes → ideal for shops and offices.
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Ducted units → fully concealed in the ceiling or wall.
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Floor-standing models → suitable for renovation or where wall space is limited.
5. Budget & Installation Costs
The costs depend on:
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The number of indoor units.
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The required power.
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Any additional functions (WiFi control, air purification, silent mode).
Although the investment may be higher than with a mono split air conditioner, a multi split system pays for itself through lower energy costs and greater flexibility of use.
6. Reliable Brands
Go for reputable brands known for quality and energy efficiency, such as:
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Daikin
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Mitsubishi Electric
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LG
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Panasonic
The right choice for a multi-split air conditioner depends on the number of rooms, the capacity, the type of indoor unit, and your budget. With an energy-efficient model from a reliable brand, you'll enjoy an optimal indoor climate for years to come.
Costs and Energy Savings
A multi-split air conditioner is a smart investment, but the total cost depends on several factors. While the initial purchase price is often higher than for a mono-split system, the installation pays for itself through lower energy costs and higher efficiency.
1. Purchase costs
The price of a multi-split air conditioner is determined by:
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The number of indoor units you choose (usually 2 to 8).
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The power (kW) per unit, tailored to the size of the room.
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The type of indoor unit (wall-mounted, ceiling cassette, duct-mounted, or floor-standing).
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Additional features such as WiFi control, silent mode or air purification.
On average, the cost is between €2,000 and €6,000 , including installation, depending on the configuration and brand.
2. Installation costs
Installation must be carried out by a certified air conditioning installer. Costs vary per project and depend on:
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Length of pipes between indoor and outdoor units.
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Complexity of the installation (wall, ceiling, duct).
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Any structural adjustments.
3. Energy consumption
A multi-split air conditioner is very energy efficient thanks to:
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Inverter technology : regulates power according to need, prevents peak consumption.
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High energy label (A++ or A+++) : lower electricity costs in the long term.
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Heat pump function : in addition to cooling, also efficient heating in winter.
This quickly saves you 20–40% energy compared to traditional systems or multiple separate mono split units.
4. Subsidies & Incentive Schemes
In the Netherlands, there are sometimes subsidies or tax benefits for installing energy-efficient climate control systems (for example, through the ISDE subsidy or business schemes). This makes the purchase even more attractive.
5. Cost vs. Long-Term Savings
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Short term: higher purchase and installation costs.
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Long term: significantly lower energy bills and less maintenance due to just one outdoor unit.
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Lifespan: with proper maintenance, a multi-split air conditioner will last an average of 12–15 years.
A multi-split air conditioner requires an initial investment, but thanks to its high energy efficiency, lower electricity costs, and potential subsidies, this system delivers significant long-term savings. This makes it a sustainable and cost-effective choice for both homes and businesses.
Frequently Asked Questions (FAQ)
1. What exactly is a multi-split air conditioner?
A multi-split air conditioner consists of a single outdoor unit that controls multiple indoor units . This allows you to cool or heat multiple rooms individually with just one outdoor unit.
2. How many indoor units can I connect to a multi-split system?
Depending on the model, you can usually connect 2 to 8 indoor units to a single outdoor unit. The number depends on the brand and the capacity of the system.
3. Is a multi-split air conditioner energy efficient?
Yes, multi-split air conditioners use inverter technology and have a high energy rating (A++ or A+++) . This means the system uses less energy than multiple individual air conditioners or mobile units.
4. Can I control each room separately?
Yes, each indoor unit has its own thermostat and remote control. This allows you to adjust the temperature individually for each room for optimal comfort.
5. How much does a multi-split air conditioner cost, including installation?
The costs vary between €2,000 and €6,000 , depending on the number of indoor units, capacity, brand and the complexity of the installation.
6. Is there a subsidy available for a multi-split air conditioner?
Yes, in the Netherlands you can sometimes take advantage of schemes like the ISDE subsidy or tax benefits for business applications. This makes the investment more attractive.
7. How much noise does a multi-split air conditioner make?
Modern multi-split systems are whisper-quiet . The indoor units often produce no more than 19–30 dB , comparable to a soft hum.
8. Can a multi-split air conditioner also heat?
Yes, most systems are equipped with a heat pump function . This allows you to heat efficiently in addition to cooling, even at low outdoor temperatures.
9. How long does a multi-split air conditioner last?
With proper maintenance, a multi-split air conditioner will last an average of 12 to 15 years . Regular maintenance extends its lifespan and ensures optimal performance.
10. How often should a multi-split air conditioner be maintained?
We recommend having the system inspected and cleaned annually by a certified installer. This prevents malfunctions and maintains high efficiency.
Conclusion
A multi-split air conditioner is the ideal solution for those who want to comfortably cool and heat multiple rooms with just one outdoor unit. The system combines energy efficiency, flexibility, and aesthetics, making it a smart investment for both residential and commercial properties.
Compared to portable or individual mono-split air conditioners, a multi-split system offers greater comfort, lower long-term energy costs, and quiet operation. While the initial investment can be higher, it often pays for itself thanks to the energy savings and longer lifespan.
