How a heat pump works
Reducing emissions
A solution in step with the latest sustainable technologies
Before we delve into the operation of the heat pump, it is worth noting that this solution represents the best application for reducing atmospheric emissions and beating the concentration of greenhouse gases.
A clear example is the transition from fossil-fueled appliances such as gas boilers to those powered by electricity such as heat pumps: this transition is necessary to significantly improve the quality of life and the environment.
In fact, new buildings are being designed to be full electric: they reduce the ecological footprint imprint on the world by reducing heat loss and optimizing consumption accordingly with a positive impact on operating costs.
Efficiency, sustainability and convenience tell us that electricity, produced from renewable sources, is the most environmentally friendly and low-impact energy carrier conceivable today.
Electrification is a broad concept that sees an increasing shift to the use of electricity from renewable sources to meet the needs of building air conditioning, transportation and industrial production.
Why choose it and how it works
It is environmentally friendly and economical, with many advantages
A home heated by a heat pump consumes less primary energy and thus allows the building's energy class to be improved.
The heat pump provides the traditional comfort of combustion systems along with energy and economic savings in a modern, environmentally friendly home. Legislation, European/world orientation and common sense are pushing for the adoption of this technology to protect the environment. And this should already be enough to adopt this technology.
There is also an additional aspect that should not be underestimated: a heat pump system is much more efficient and economical when compared to fossil fuel heat generators such as, for example, gas boilers.
The principle of operation
An air-to-water heat pump has two main functions: heating house and, if required, producing domestic hot water.
The heat pump extracts heat from the outside air to transport it inside the building, heating it according to the type of system and with the possibility of producing domestic hot water via a domestic storage tank.
If it is reversible, you allow not only heating, but also cooling the rooms making it usable throughout the year for constant comfort.
Ideal and mandatory for new construction, perfect for better efficiency and savings in case of renovations.
The heat pump is indeed a source of energy savings due to its excellent energy efficiency: the amount of thermal energy produced is greater than the amount of electricity consumed.
The heat pump has within it a closed circuit containing a refrigerant fluid capable of moving from liquid to gaseous state and vice versa, resulting in changes in temperature and pressure.
This process is cyclic in nature and, thanks to the presence of components such as evaporator, condenser, compressor and expansion valve allows the movement of heat with the sole use of electricity, making heat pumps combinable with renewable energy production systems.
The operation of an air-to-water heat pump relies on the joint action of its two constituent units:
- the outdoor unit, whose role is to take or give up heat to the outside air through the principle of operation described above;
- the indoor unit, which will have the function of exchanging heat from the outdoor unit to the heating/cooling/hot water production circuit.
In comparison with conventional heating systems, there is lower energy consumption and a reduction in harmful emissions.
The heat energy captured significantly exceeds the amount of electrical energy required for its operation.
Type of application
Split heat pumps, with the presence of refrigerant gas between outdoor and indoor or built-in units
The main feature of split heat pumps is the presence ofrefrigerant gas between the outdoor unit and the indoor unit (or built-in for the Inwall system).
The system consists of a direct expansion outdoor unit that draws heat from the air and an indoor unit to which energy is transferred via refrigerant gas.
This solution is the ideal solution for any climatic condition as there is no danger of icing in the piping between the outdoor and indoor units.
From the indoor unit, heat is then transferred to the water circulating within the home system. Solutions are available for heating/cooling with or without domestic hot water production.

Multi heat pumps, with presence of refrigerant gas between outdoor and indoor units
Pure Flexibility.
The Multi system is a hybrid air/air and air/water system that allows you to combine the flexibility of a multisplit direct expansion air conditioner for heating and cooling with the comfort of a hydronic heat pump capable of producing hot water for heating and, if required, domestic hot water as well.


Main characteristic of packaged heat pumps is the presence of water between the indoor unit and the outdoor unit: a completely water-cooled solution.
"Packaged" heat pumps are particularly simple to install: the refrigeration circuit is "hermetically sealed" in the outdoor unit, and the connecting piping to the indoor unit is water-cooled plumbing.
Therefore there is no need to carry out the typical procedures of direct expansion air-conditioning systems such as vacuum.
Heating/cooling solutions with or without domestic hot water production are available.
They are available.

Ready for use.
The packaged heat pump is an outdoor unit with inside it already all the components necessary to be connected to the water distribution system.
As with "Packaged" heat pumps , again there is no need to carry out the typical procedures of direct expansion air conditioning systems, such as, for example, vacuum.
The integrated hydronic unit includes all hydraulic components, such as the plate heat exchanger antifreeze resistor, discharge pump, expansion tank etc. which allow optimizingthe space, timeand costof installation.
Heating/cooling solutions are available with or without domestic hot water production via external storage.
Indoor units that can be matched
Indoor or built-in hydronic modules offer great flexibility of use for the generation of hot water for winter heating, summer cooling with or without domestic hot water production.
Featuring compact dimensions, they enclose all the main components of the plumbing system inside them for quick and easy installation and practical and immediate use.
In relation to the chosen heat pump, the following indoor or built-in units can be combined.

Binding the outdoor unit with the indoor module Hydrotank it is possible to meet all heating, cooling and integrated hot water production needs.
In fact, the Hydrotank module is equipped with a 170, 200 or 300 liter storage tank to meet a variety of domestic hot water needs depending on the chosen heat pump capacity.
The simplicity and convenience of the "all-in-one", easy to install, ideal for floor installation in small alcoves or reclosets.
All the main components of the plumbing system (domestic hot water storage, heat exchanger, hydraulic circulator, expansion tank, supplementary electric heater and safety components) are enclosed inside.

By combining the outdoor unit with the indoor module Hydrobox it is possible to meet all heating and cooling needs.
The Hydrobox module provides great flexibility of use and versatility of installation in wall units in kitchens, closets, small technical compartments.
An optional external boiler can be associated with it for domestic hot water.
All the main components of the hydraulic system (heat exchanger, hydraulic circulator, expansion tank, supplementary electric heater, and safety components) are enclosed within it.
The Hydrobox

Flush-mounted system complete with all the necessary components for heating, coolingand integrated hot water production needs:
- Outdoor box complete with template and faucets;
- 175-liter ACS cylinder with rigid insulation;
- Hydraulic distribution kit;
- heat pump;
- Hydrobox module;
- ACS probe (PACTH011TK2-E);
It is the ideal hidden system: a complete solution designed and developed to be recessed.
Brochure

Mitsubishi Electric Heat Pump Solutions
Discover Mitsubishi Electric heat pump solutions. Download the brochure and choose the ideal solution for your needs.