Frequently Asked Questions

All of our products are backed by a service portfolio that enables us to maintain reliable and beneficial customer relationships throughout the life of the device.

The service life of a heat pump depends greatly on the quality of its key component - the compressor and all other components that are manufactured exclusively in Europe. A heat pump with the PZP mark will last at least 20 years without failure. We installed the first heat pumps back in 1995, so the service life of heat pumps has already been proven by practice.

PZP heat pumps already have a 5-year extended warranty for the entire heat pump already included in the basic price and without additional charges. This warranty covers, in the event of any defect in the heat pump, all repair costs, ie spare parts, service technician's work and transport costs.

Service and maintenance of heat pumps

We recommend a regular service inspection by a specialist on the heat pump.

Inspection should be performed at least every two years for the following reasons:

• proper maintenance and parameter settings will extend the life of the heat pump
• during the service inspection, sufficient flow and heating water temperature settings are also checked to prevent the heat pump from decreasing its efficiency
• we ensure regular checks of the heat pump cooling circuit for leaks

For heat pumps, we recommend a regular service inspection, be it a heat pump for a single-family house or an apartment building. Regular service should be performed once a year.

Heat pump service is best done in summer. It is not necessary to heat the pump during this period, so it is used less frequently. During the service inspection it is also possible to adjust the heat pump settings according to real consumption and other parameters. This will make the operation of the plant even more efficient for the next heating season.

Nowadays, heat pumps are manufactured with maximum thermal and acoustic insulation, which will guarantee trouble-free silent operation and long product life. For example, in the case of ECONOMIC heat pumps, a lower air resistance was achieved and thus a noticeably reduced noise level was achieved by expanding the spacing of individual slats. Heat pumps today are therefore more efficient, economical and noticeably quieter. Prices of individual products can be found in our price list of heat pumps.

Need help calculating your heat pump's return on investment? We will help you! Just fill in the non-binding inquiry form and our team will contact you as soon as possible.

The decision to buy a heat pump made in a hasty manner within the time-limited "advantageous discounts" can significantly increase the cost! When purchasing any technical equipment it is good to ask several suppliers and compare their technical solutions and prices. This will take more time, but will significantly reduce the risk of buying, for a given purpose, an unsuitable or technically backward product. See the selected heat pump in operation. During the inspection, focus on the quality of workmanship, the noise of the heat pump and the experience of the owners with the work and service of the supplier.

The company PZP HEATING a.s. produces heat pumps of all three types. On the following lines we will compare their main advantages.

Advantages of the air-water heat pump:

• attractive heat pump purchase price and quick return on investment
• easy and thus cheap installation of the air-water heat pump
• possible year-round operation of an air-water heat pump with efficient use for hot water and pool water heating
• air-water heat pumps do not disturb the ambient temperature balance

Advantages of a brine-water heat pump:

• stable heating output
• favorable COP (COP)
• compact device for indoor installation
• especially suitable for installation in colder areas

Advantages of a water-water heat pump:

• constant water-water heat pump performance
• very high COP (COP)
• compact device for indoor installation
• particularly suitable for installation in areas with high groundwater levels

• it separates the required constant flow through the heat pump and the flow through the heating system
• it contains sufficient heat to defrost the air-water heat pump evaporator
• increases the volume of water in the heating system and thus prevents improper cycling of the heat pump operation, which extends the life of the heat pump
• the container can be fitted with electrical elements, which is then replaced by a supplementary heat source

Whether you have an older non-insulated family house with old radiators or you own an insulated office building with underfloor heating, a heat pump will certainly pay off. The most popular option for old houses is air-to-water heat pumps, mainly because the installation is fast and there is no need for earthwork. The investment in an air-to-water heat pump is also not too high. Thanks to the wide assortment of the PZP brand, it is quite easy for us to choose the right device for you.

The PZP assortment currently includes almost 100 models of heat pumps, only in the air-water segment PZP offers 4 model series (DYNAMIC, ECONOMIC, AMBIENT and SPLIT).

Do you want to know what type and performance of the pump is right for you? We will be happy to advise you. Fill in the non-binding inquiry form and our expert team will contact you as soon as possible.

Heat pumps are an alternative energy source because they allow to remove heat from the environment (air, earth or water), convert it to a higher temperature level and then use it for heating or hot water. To transfer the heat to a higher temperature level, a certain amount of energy must be supplied.

Air-water system

• good purchase price
• very easy to install
• with AWX outdoor compact space saving in the utility room
• efficient operation down to -20°C

Brine-water system

• stable heating performance throughout the year
• higher COP (coefficient) = lower electricity consumption
• possibility of passive cooling
• low energy circulation pumps

The air-water heat pump is advantageous for use in all new and existing buildings where a flat collector or borehole cannot be realized (eg due to the requirement for a larger plot area). Stable heating capacity and high heating factor predetermine brine-water heat pumps for installation in colder (mountain) areas.

Like any other heat source, the heat pump is designed to cover the heat loss of the building. Heat losses are calculated according to specified criteria for a certain outdoor temperature.

When designing a heat pump, the following criteria must be respected:

• The energy saving ratio depends on the size of the heat pump (its total input).
• To increase the life of the heat pump, it is necessary to minimize the number of compressor starts.
• Efforts to reduce the cost of investment (assessment of acquisition and operating costs).

To design the optimum heat pump performance, it is necessary to know:

• total heat demand for heating (heat loss of the house)
• heat demand for hot water
• selected heating system (floor heating / radiators)
• selection of supplementary heat source
• location and altitude (temperature area)
• requirements of the investor and operation of the building

Bivalent system

A heat pump is not the only heat source. It works in combination with a supplementary heat source - eg an electric boiler, gas boiler, oil boiler, etc. The heat pump is the basic and main heat source, which works throughout the heating period and the supplementary heat source completes the missing heating output for the necessary time.

Bivalence point

The outdoor air temperature at which the heat output of the heat pump is equal to the heat loss of the building. If the outside air temperature drops below this value, an additional heat source is connected to the heat pump.

After heating, hot water is the largest financial item in the house's operating costs. Hot water heating by a heat pump is comfortable, maximally economical and environmentally friendly.

Any storage tank with sufficient heat exchange surface of the internal heat exchanger can be connected to the heat pump. The solution for year-round hot water heating is worthwhile with regard to the initial investment, especially in installations with higher daily consumption of hot water or in installations where the boiler with “auger” or other heat exchanger already exists.

For heating systems with PZP heat pumps we recommend a combined storage tank with a hot water heater. Rapid heating of hot water takes place in a spiral coil. The special shape of the pipeline ensures high heat transfer efficiency and at the same time eliminates sedimentation in the accumulation tank in hard water areas.

General features and advantages of use:

• very fast hot water heating in a separate tank
• the enamelled tank ensures all hygienic requirements for hot water quality
• built-in titanium anode increases the corrosion resistance of the tank
• possibility to connect hot water circulation
• storage tank for heating made of thick-walled steel sheet
• removable sheath of thermal insulation made of flexible polyurethane foam th. 50 mm
• easy installation and connection to the heat pump

For the installation of a heat pump it is especially important to have a hot water heating system. If you have any radiators or underfloor heating, you have won.

For the heat pump to function properly, it is essential that the installed heating system is able to heat the building even with a lower heating water temperature. At the same time, the piping must be adapted for twice the flow of water than in conventional heating systems. Thus, a large volume of water in an older fin radiator system is a benefit, not a shortage. Just check if the size of the radiators is sufficient.

We will assess the heating system for you free of charge:

• our heating designer calculates the heat loss of the building
• furthermore, according to the heat loss, it will design or check the heating system so that thermal comfort in each room is ensured
• it is more economical to adapt the heating system to the heat pump than to operate the heat pump within its limits

Yes, the choice of heat pump depends on local conditions. Ultimately, a hasty purchase decision can become significantly more expensive.

Therefore, before purchasing a pump, it is advisable to contact the heat pump supplier directly to compare the offers and information provided by each company. Owners of new buildings often make the mistake of leaving the choice of heat pump fully up to the construction company, which, however, does not solve the ideal heating system for the house. Therefore, we should not buy heat pumps for single-family homes in a hasty manner without sufficient information.

Do you want to know what type and performance of the pump are right for you? We will be happy to answer this question. Fill in the non-binding inquiry form. We will contact you as soon as possible.

Perhaps the most common question asked by those interested in a heat pump is which type of heat pump they should buy. There are three basic types of heat pumps: air-water, brine-water and water-water.

Individual pump types have the following advantages:

• Air-water heat pumps
  The best-selling type of heat pump that corresponds to the climatic conditions in the Czech Republic is air-water heat pumps. The big advantage of air-water heat pumps is the purchase price, quick return on investment due to easier installation. There is no need to have land and heat pump installation can do without earthwork. It can be used for both heating and hot water.
• Brine-water heat pumps
  These heat pumps impress with stable heating performance, which is much less dependent on air temperature, and are particularly suitable for colder areas.
• Water-water heat pumps
  Water-water heat pumps have a constant coefficient of performance (COP) and constant heat output. They are particularly suitable for areas with more groundwater.

Do you want to know what type and performance of the pump are right for you? We will be happy to answer this question. Fill in the non-binding inquiry form. We will contact you as soon as possible.

The investment in the heat pump will return within a few years, usually in the range of 3 to 10 years, depending on the pump type, the energy performance of the heated building and the surrounding conditions. Price list of heat pumps for calculation of return on investment can be found on our website in section - price list.

Need help calculating your heat pump's return on investment? We will help you! Just fill in the non-binding inquiry form and a specialist from our company will contact you as soon as possible.