Heat pump system

Heat pump system

We have been building heat pumps for over 12 years

The principle of the heat pump is a very old technology that had begun already with the first cooling devices.

The heat pump includes a compressor, a pump. It is a device that "pumps" heat from a low level to a higher one. The source of heat can be the surrounding air, the ground from the borehole, the ground from the surface collector, the pumped water from the water well, the water from the river, the water from the water channel of the waterworks, sewage, etc...

Types of Heat Pumps How do we proceed?

Why Heat Pump

As long as energy was cheap – coal, electricity, gas, the heat pump was mostly used in space technology, where there was no other way to cool and heat in space.

With the rising price of energy – first elevation of electricity – and more affordable and cheaper compressors, where there was no other heating option than electricity and people did not want to heat with coal or pellets, we started the first installation of a heat pump in 2010. Most of it was in areas without gasification, such as the region of the Bohemian Paradise.

At present, with the rising price of gas, it makes absolute economic sense to buy a heat pump instead of or in cooperation with a gas boiler.
There is also a safety factor why to buy a Heat pump system (Being that whether there will be enough gas in the near future.).

Types of Heat Pumps

The most common heat pump we build is the air to water heat pump which is the least investment-intensive with SCOP 1:3. In the event that the owners want a more efficient system and have a sufficient area of land or space for boreholes, we propose a geothermal variant.

In the case of air to water heat pumps, we got the genesis years ago through several brands, both Czech and renowned foreign manufacturers, to Mitsubishi Electric. Mitsubishi Electric heat pump in the price performance ratio exceeds the competition in reliability, repeatability of products, service, support. The quality is also evidenced by the fact that outdoor units are also supplied to other manufacturers of heat pump, which then pass them off as their own as OEM products. The same can be said about compressors, where OME is one of the few real compressor manufacturers.

For geothermal heat pumps, we are partners in the design of Buderus geothermal heat pumps, which are in principle Swedish IVT, since the Bosch Thermal Technology Group bought this company.

For all heat pumps, not only the manufacturer and quality of the equipment is important, but also the way it is connected to an existing or new heating system plus how it is operated. The basic principle that is important to aim to is to heat to the lowest temperature possible. This means underfloor heating is an excellent addition to underfloor heating.

For geothermal heat pumps, we are partners in the design of Buderus geothermal heat pumps, which are in principle Swedish IVT, since the Bosch Thermal Technology Group bought this company.

For all heat pumps, not only the manufacturer and quality of the equipment is important, but also the way it is connected to an existing or new heating system plus how it is operated. The basic principle that is important to aim to is to heat to the lowest temperature possible. This means underfloor heating is an excellent addition to underfloor heating.

For inverter heat pumps, it is also important to limit the number of start-stop, which prolongs the life of the heat pumps. The number of start-stop is determined by the design of the size of the heat pump, when the heat pump is designed for 80% of the heat loss of the building. The larger the heat pump is, the more stop starts can occur, because the heat pump starts and then brakes and this is how it repeats. I.e. it is not wise idea to place neither too small or too big pump.

The smaller the heat pump is placed, the more time it will run at 100% and thus also reduce the service life of the heat pump can be reduced. When designing the installation of the heat pump, we take into account both the size of the houses (the size of the heat pump) and the connection to the heating system, so that we are able to finally create an alignement with the heat pump and the heating systém. Then the customer can operate it efficiently, achieving desirable savings and a long service life of the product.

Since we have been installing heat pumps for over 10 years and we know how well and reliably Mitsubishi Electric heat pumps behave, we offer to our customers not only a standard five-year warranty from the manufacturer, but also another five-year warranty on the compressor, which is already under the direction of our company. The condition is to comply with the annual inspection service, where we verify not only the technical condition of the equipment, but also the operating parameters. In this way, we are able to ensure and guarantee long-term durability and efficiency. With a 10-year warranty, we want to express that we believe in the technology supplied and at the same time we believe in our work. We believe that we are doing well and that the device is capable of continuous operation for more than 10 years.

It often happens to us that customers approach us with the fact that they want a photovoltaic system and that they have an electric boiler. I explain to them that we must first optimize their consumption and design the size of the PV power source for this optimized consumption. This is the right way of energy self-sufficiency to optimize consumption. This means that for electric boilers, we first offer the installation of a heat pump.

A) Heat pump + gas boiler

In the case of gas boilers, we offer smart cooperation / between the heat pump and the gas boiler. In the regulation of the heat pump we enter data on the price of electricity and the price of gas. Regulation heat pump Mitsubishi Electric can calculate the current price of heat from the heat pump and gas boiler and decide which of the sources is cheaper (or more environmentally friendly).

B) Heat pump + solar collectors

Photothermal solar collectors can also be combined with a heat pump, only the paybacks/meaningfulness will be a little longer, because the heat pump produces inexpensive and affordable heat and the returns of the collectors are calculated from the cheapest heat source. Nevertheless, there is a hardly economically quantifiable effect (saving operating hours), when in midst of the summer the heat pump standardly rest and the preparation of hot water is handed over to photothermal collectors.

C) Heat pump + PV system

We also offer the alignment of the heat pump with photovoltaic systems, which are a good complement to the heat pump, as the heat pump consumes electricity. It is clear that photovoltaics is strongest in summer and in winter its production decreases to 20-30% depending on the orientation / slope of the panels, but in the transition period spring autumn, the production of PVPP is sufficient to cover consumption from heat pump.

Summer surpluses from PVPP can be used using the tariff from CEZ purchase"Electricity for solars", where you can store electricity in the grid and then take it in winter. Thus, THE PVPP can be a convenient and effective supplement to the heat pump. We can also intelligently control the heat pump, when in the event of electricity overflow into the network from the PV system, we automatically raise the temperature to the heating system or TV – the so-called Smart Grid function and thus prevent overflows into the network. When using the contract with CEZ Purchase "Electricity for Solars", this is starting to make a bit of a lack of sense, but it does make sense for the future. Electricity for solar is currently contracted for 3 years with announced extensions for another 3 years, but under unclear conditions.

D) Heat pump air to air

A special heating solution are air-to-air heat pumps, which are in principle standard air conditioning, which, however, must contain a 4-way valve that reverses the operation of the device and air conditioning, which could only cool, can then also heat.We started to use the air-to-air heat pump in installations where there are no hot water distribution of radiators from the time of new buildings after the completion of Temelín, when it was said that electricity is cheap, it is not worth doing hot water distribution and people had only electric heaters in family houses.

Air-to-air heat pumps can be a cheaper addition to a standard heat pump for heating water, as the distribution systems are simpler, heated to a low air temperature and even small systems can be used. Therefore, this system can also be used as an economizer for existing systems or even for small spaces.


  • determination of the size of the building's heat loss
  • design of the size and type of heat pump
  • proposal how, to connect to the heating systém
  • design of regulation and operation of the heat pump versus the heating systém
  • securing a grant title, if it can be drawn (New green savings)
  • proposal to change the electricity tariff
  • setting a price budget
  • Conclusion of the Contract for Work
  • realization of complete delivery of heat pump, cooling, heating, electrical, construction work
  • interconnection with other PV technology, gas boiler and other
  • handover of training
  • proof of subsidy
  • until the change in the electricity tariff is settled
  • annual service (maintenance of warranties)

As a standard, our heat pump design starts with a discussion of the customer, what exactly he is looking for and whether the heat pump is a suitable source. Not all properties – their heating systems – are good for the installation and operation of heat pump. High-temperature heating systems and large old buildings are more suitable for "fire" sources such as pellets, coal and gas.

First, we have to determine the heat loss of the building either by calculation or preferably from the annual bill of energy that is heated (or by the sum of energies). According to this calculation, we determine the size/power of the heat pump, which is set at 80% of this value anyway, because those days that are really at -18 °C are statistically several days a year when the heat pump helps itself with electric cartridges. It is also the operating range of the power of the inverter technology of the heat pump, where the limitation is determined by the number of start tracks that need to be reduced to the smallest possible value. It is therefore a power range of the heat pump from the minimum value to the max.


About company ENESO

Company ENESO was founded in 2009 and since its origin has been engaged in design-implementation-service of photothermal and photovoltaic solar systems, electronic security systems, GSM cameras and heating. Solar panels are used for year-round water heating in homes and are designed to make the most of the impact of the solar rays throughout the year, while at the same time returning the initial investment as quickly as possible.

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Eneso s.r.o.

Headquarters: Žitavská 56/50, 460 01 Liberec (map)

Prague office: Podnikatelská 565, 190 11 Praha 9 - Běchovice (Areál BĚCHOVICE KKIG budova 10A) (mapa)

Brno office: Božetěchova 133,
612 00 Brno - Královo Pole (map)

Owner & executive director: Ing. Alois Láska, Ph.D.

Phone: +420 605 502 676

Email: alois.laska@eneso.cz

IN: 22772804 │ TIN: CZ22772804

File mark:
C 30960 registered at the Regional Court in Ústí nad Labem

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