Heat pumps are an increasingly popular solution for heating and cooling homes. The two main types of air source heat pumps, monobloc and split, offer different approaches to constructing an efficient source of heat energy. In this article, we will look at aspects that will allow us to answer the question - "why might a monobloc heat pump be a better choice than its split counterpart?"
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Simplicity of installing monoblock heat pumps
Monoblock heat pumps are characterized by a much simpler installation compared to split heat pumps. In the case of a monoblock, all the main components, such as the compressor, heat exchanger, control system, are located in one housing and are completely installed in the heat pump.
This makes the installation of a monoblock pump much simpler, requires less complicated assembly work and is limited only to hydraulic and electrical connections. Without the need to build a gas connection, which in turn requires specialist knowledge and equipment as well as significantly more time.
Split heat pumps, on the other hand, consist of two main units: one located inside the building (e.g. in a utility room, garage or boiler room) and the other outside. This division introduces additional difficulties related to the arrangement of components and the need to connect them using pipes transporting refrigerant gases and ducts. The simplicity of installing a monoblock heat pump translates into lower costs related to assembly and a much smaller chance of making assembly errors.
Heating capacity of monoblock heat pumps
Monoblock heat pumps can be more efficient due to lower heat losses during the transfer of heat energy between units. Additionally, the proximity of all components in one housing significantly reduces internal energy losses. In the case of split heat pumps, the pipes and ducts connecting the internal and external units can cause some heat losses, which can affect the efficiency of the entire system.
In addition, monobloc heat pumps are usually more condensed, which allows for better control over the heat transfer process. As a result, in low temperature conditions, monoblocs can maintain higher efficiency compared to split heat pumps.
Aesthetics and space of monoblock heat pumps
Monoblock heat pumps are more aesthetic, because all components are enclosed in one housing. This solution is particularly attractive for people who particularly care about the aesthetics of their surroundings, because the monoblock can be easily hidden and in some cases also adapted to the building's surroundings, e.g. by ordering a device in a color matched to the building's facade.
Split heat pumps, due to the two units, one of which requires installation inside the building, may also require more space and may be less aesthetically pleasing. Additionally, installing the internal unit in a room may limit the possibilities of arranging the space inside the building. It is also necessary to make a connection to ensure the circulation of refrigerant gases between the unit installed inside and outside the house.
Ergonomics of the monoblock heat pump operation
In a monoblock pump, the compressor and all other components are placed in one housing mounted outside the building, which means that all the noise generated by the devices remains outside. 
An additional advantage of monoblock heat pumps is the possibility of using the R290 refrigerant, which allows for higher flow temperatures.
While both heat pumps have their advantages, the monobloc heat pump seems to be the better choice for many reasons. Simplicity of installation, efficiency and aesthetics make monoblocs an increasingly preferred solution for heating and cooling buildings. Of course, the final choice depends on individual needs, budget and installation conditions, but monobloc heat pumps are certainly worth considering due to their many advantages.
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