10.01.2023 Exhibition in Ostrava and Prague

Our Czech distributor 4Heat will appear at two fairs in the Czech Republic!

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07.06.2021 Modern R290 propane inverter heat pump

NOVELTY! We proudly present our latest product - a modern R290 propane inverter heat pump.

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12.04.2021 HKS Lazar heat pumps reached the finals

European EW Awards 2021 competition!

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13.11.2020 Another HKS Lazar Heat Pumps on the BAFA list

Once again, the high-quality HKS Lazar Heat Pumps were awarded. This time our products were appreciated in the German BAFA.

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19.10.2020 Another competition and HKS Lazar Heat Pumps became the finalist

HKS Lazar heat pumps were the finalist of the HVR Awards 2020 for the product of the year in two categories: Net Zero Hero oraz Domestic product of the year.

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15.10.2020 HKS Lazar heat pumps nominated in the RAC Cooling Industry Awards 2020

We are proud to announce that we have been nominated in three categories in the prestigious RAC Cooling Industry Awards 2020 competition. Keep your fingers crossed for us :)

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26.06.2020 As the only one from Poland, we took part in the ATMOsphere conference

A series of global meetings of the heat pump and air conditioning industry taking place on all continents

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06.02.2020 HKS Lazar Hot air water Heat Pump on the prestigious BAFA list

We are proud to announce that our Heat Pumps are on the prestigious BAFA list.

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18.10.2018 II International Forum – Energy and Environment

Welcome to our booth at II International Forum Energy and Environment. Our booth will be located within premises of Wielka Krokiew (Zakopane) on 3-6 June.

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03.05.2018 Exhibition - Pellet Fired Boilers 19-20 May

We invite to the boiler exhibition held in our premises on 19-20 May in Jastrzębie-Zdrój at Wodzisławska 15B.

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Modern heating devices HKS Lazar

Modern heating devices


Propane R 290 as a refrigerant in heat pumps, and applicable legal regulations

Observing the heat pump industry in recent years, we can confidently say that more and more people are becoming convinced of this form of heating. This happens, inter alia, because we are eager to build houses of a small size, without cellars, and therefore also a place for a central heating boiler. and fuel for it.

Central heating pellet fired boiler with or without lambda probe?

There are many different views regarding use of lambda probe in central heating stove. However to find out if this investment makes sense, let us examine its operating principle as well as all advantages and disadvantages.



How to check anti-freeze fluid level in Smart Fire 11 boiler with central heating function only (without hot domestic water supply). The boiler was not used this winter?

Any fluid loss will be demonstrated with pressure loss indicated by manometer. In case of open circuit, you can also check the level of compression vessel.

Is 190oC temperature of flue gas in Lazar branded pellet fired boiler allowed?

This temperature is possible, if the heat exchanger gets dirty and boiler has been in operation for few hours at total output (at low outdoor temperature). In this case clean the boiler and check...



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