Note: Our Heat pumps are onlly available for the Dutch market. More and more companies and organizations are looking for sustainable alternatives to their gas-fired heating systems. Gas is becoming increasingly expensive, and with climate targets and regulations in mind, many organizations are switching to a heat pump or a hybrid heat pump. One of the most accessible and popular options is the monoblock air-to-water heat pump. In this blog, we explain what a monoblock heat pump is, how it works, what the benefits are, and what to keep in mind when considering this solution.
What is the difference between a monoblock heat pump and a split-unit heat pump?
An air-to-water heat pump uses heat from the outside air to warm water for central heating and, if needed, domestic hot water in your commercial building. This system is a sustainable alternative to a traditional gas-fired boiler. There are two main types of air-to-water heat pumps: monoblock and split-unit. The difference lies in their construction. In a monoblock heat pump, all technical components are housed in a single outdoor unit. Within this unit, the refrigerant and compressor work together to heat the water. The heated water is then transported via pipes to the indoor heating system. In a split-unit heat pump, the components are divided between an indoor and an outdoor unit. The refrigerant is transported from the outdoor unit to the indoor unit through pipes, where it heats the water for the heating system.
The system is popular due to its simplicity, lower risk of leaks, and ease of installation.
How does a monoblock heat pump work?
A monoblock heat pump is a self-contained outdoor unit that heats the water for the heating system. This hot water is then transported indoors. The operation of a monoblock heat pump works as follows.
- Heat absorption: The outdoor unit extracts heat from the outside air using a fan, even at low temperatures. This heats the refrigerant inside the heat pump.
- Evaporation: The refrigerant in the system evaporates at a low temperature and becomes hot.
- Compression: The compressor compresses the refrigerant, causing the temperature to rise further to around 100 °C.
- Condensation: The hot vapor condenses in the heat exchanger and transfers heat to the water in the heating system.
- Distribution: This heated water is sent to the underfloor heating, radiators, or sanitary facilities.
The entire process takes place in the outdoor unit. Water pipes run to and from the interior of the building. In such a system, no refrigerant pipes run from outside to inside the building.
What are the advantages of a monoblock heat pump?
A monoblock heat pump has several advantages:
Easy installation
Because all the technology is housed in the outdoor unit, less work is required indoors. No certified refrigeration technician is needed for the installation, which saves on costs and simplifies scheduling.
Compact system
The indoor space remains largely unaffected. Ideal for renovations, replacing the heating system, or when indoor space is limited.
Less prone to malfunctions
No refrigeration connections mean a lower risk of leaks or malfunctions. There are no refrigerant pipes running between the inside and outside.
Sustainable and energy-efficient
A well-adjusted heat pump can reduce gas consumption by 100% and operates on electricity.
Suitable for both hybrid and all-electric applications
The monoblock heat pump can work together with your boiler (hybrid) or heat independently (all-electric).
Are there also some disadvantages to consider?
Like any system, the monoblock heat pump also has a few considerations:
Dependent on outdoor temperature
Efficiency decreases during severe frost. In well-insulated buildings, this is less of an issue, but in older buildings, supplementary heating may be necessary.
Space for the outdoor unit
The unit is larger than an air conditioner and must be placed freely with sufficient airflow.
Noise
Although many modern models are whisper-quiet, the unit does produce some noise. Therefore, be mindful of noise regulations.
Good building insulation is a must
A heat pump works best in a well-insulated building. Think of floor, roof, and wall insulation, as well as high-performance double or triple glazing.
Who is this system suitable for?
A monoblock heat pump is particularly suitable for property owners who want to make their buildings more sustainable and save on gas consumption. It is especially an attractive option during renovations or when replacing an old gas boiler. Additionally, this system can be easily connected as a hybrid setup to the existing central heating installation.
Companies that purchase a heat pump or hybrid heat pump may be eligible for subsidies. All heat pumps from Eco Heating Systems are registered and qualify for subsidy support.
Would you like to learn more about monoblock heat pumps?
A monoblock heat pump is a smart, sustainable choice for those looking to reduce gas consumption. The system is relatively easy to install, requires little maintenance, and provides a comfortable indoor climate. Thanks to subsidies, the investment is becoming more accessible, and with rising gas prices, it quickly pays off.
Would you like to know if a monoblock heat pump is the right fit for your situation? Get advice from our specialists. We’re happy to help and ready to answer your questions. Feel free to visit us at our factory—we’ll show you how it works. The coffee will be waiting!
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