Blog - sklep.wkm.org.pl

What is the air separator used for and how to install it?

Mon, 02 Feb 2026 00:00:00 GMT

Learn what an air separator in a heating system is used for, how it removes gases from the circuit and where to install it to ensure quiet and trouble-free operation of the system.

How does pressure stabilization in district heating nodes look like?

Tue, 20 Jan 2026 00:00:00 GMT

Pressure stabilization in the district heating hub - how it prevents failures in the heating system, protects the exchangers and provides comfort to users.

What is a thermal hub and how does it work?

Mon, 01 Dec 2025 00:00:00 GMT

Heating systems could not operate efficiently without a component that connects the district heating network to the indoor plant. Find out what heat hubs are, what they are used for and why they are so important.

What is an energy audit and how to conduct one?

Mon, 03 Nov 2025 00:00:00 GMT

Want to lower your bills and make your home more comfortable? Check out the building energy analysis process and the benefits it can bring you.

How to create an efficient solar installation?

Fri, 17 Oct 2025 00:00:00 GMT

Investment in solar energy solutions can pay for itself quickly and generate savings over the years. Find out step-by-step how to plan and build a solar power system that will work effectively in your home.

Pumps for central heating - what types are there and when which one to choose?

Tue, 12 Aug 2025 00:00:00 GMT

The central heating pump is a component without which a modern heating system simply would not work as it should. It's what sets the water in motion, delivering heat from the boiler, heat pump or heat exchanger to radiators and underfloor heating. It allows you to enjoy a constant temperature in each room, and the heat is distributed evenly. In this guide we will explain what types of CO pumps are currently used, how to choose the right model for your installation, and what mistakes in installation and operation can shorten the life of the device.

Limescale in the heating system - causes, effects and prevention

Mon, 04 Aug 2025 00:00:00 GMT

Scale is the bane of many users of heating systems - both owners of single-family homes and administrators of large buildings or boiler rooms. This seemingly harmless mineral deposit can lead to serious operational problems. In the following article, we explain what exactly boiler scale is, why its presence in the heating system is harmful, the main causes of its formation, and how to effectively prevent deposits through proper water treatment.

Anti-pressure valve - what is it and is it needed in a home installation?

Wed, 30 Jul 2025 00:00:00 GMT

Anti-contamination valve is a special type of check valve, the main task of which is to protect drinking water from secondary contamination. It acts like a one-way guard on the pipe - it allows water to flow only in the direction to the building, but in the event of an attempted reverse flow (backflow), it automatically blocks its path. This will ensure that contaminated water from the indoor system does not back up into the water mains or into other parts of the home system.

Danfoss ECL weather controllers - a practical guide for users and installers

Tue, 03 Jun 2025 00:00:00 GMT

Weather controllers are devices that automatically adjust the supply temperature of the heating system to changing external conditions. Their main goal is to improve thermal comfort and increase energy efficiency. In practice, this means lower heating bills and more stable room temperatures.

Domestic hot water storage tank - how to choose the right one for your installation needs?

Wed, 16 Apr 2025 00:00:00 GMT

Domestic hot water storage tank (c.w.u.) is a heated water storage tank, providing comfortable hot water in a house or building. Proper selection of its capacity is crucial - it affects both the comfort of users and the energy efficiency of the heating system. A tank that is too small can result in frequent switching on of the boiler or heat pump (to reheat the water after it is used up quickly), which increases operating costs and energy consumption. On the other hand, a tank with too large a capacity does guarantee a supply of hot water, but is associated with greater consumption of energy needed to heat and maintain the temperature of the water, generating heat loss. Therefore, it is important to select the capacity of the storage tank according to your needs - taking into account the number of users, the specifics of the installation and the heat source.

Electric actuator for the control valve - how does it work and which one to choose for the heating system?

Tue, 08 Apr 2025 00:00:00 GMT

Electric actuators for control valves are a key component of automation in heating and cooling systems. They are responsible for adjusting the valve (e.g., opening or closing the flow of the medium) according to the signal from the regulator. This allows precise temperature and flow control without manual adjustment. Below we explain what such an actuator is, how it works in conjunction with different types of valves (globe and rotary), and what to look for when selecting an actuator for your heating system. We also suggest which models are worth considering - with a special focus on Danfoss offerings - and what mistakes are most often made when selecting these devices.

How to select a new Danfoss AMB 162/182 actuator?

Mon, 31 Mar 2025 00:00:00 GMT

Danfoss actuators AMB 162/182 series are popular actuators for mixing and diverting valves in heating systems. Now Danfoss has already introduced a new, third generation of these actuators, replacing older models with newer designs. Older versions (the so-called second generation) of AMB 162/182 actuators are no longer produced - many of their catalog numbers have been withdrawn from the offer and replaced with new equivalents. In this article, we explain how to select a new Danfoss AMB 162 or AMB 182 actuator as a replacement for an older model that is unavailable. We provide a step-by-step overview of what to look for when selecting, and a breakdown of the old vs. new part numbers. In addition, we indicate the compatibility of the new actuators with valves (both Danfoss and other manufacturers) and give examples of the most popular models available on the market.

New product family: fresh water stations Reflex Hydroflow

Wed, 26 Mar 2025 00:00:00 GMT

A fresh water station is a device for the preparation of domestic hot water (c.w.u.) in a flow-through manner - that is, heating water on demand without storing it in a large tank. In practice, this means that the water is heated when the tap is turned on, passing through a heat exchanger supplied with water from the heating system. This design ensures that you get fresh water every time, without prolonged storage at temperatures that promote microbial growth. As a result, the standard of hygiene c is significantly raised.w.u. - flow-through water preparation effectively protects against the proliferation of bacteria such as Legionella. It is therefore a hygienic alternative to the traditional boiler or hot water cylinder.

Hydraulic coupling (separator) - how does it work and when is it worth using?

Mon, 24 Mar 2025 00:00:00 GMT

Hydraulic coupling (otherwise known as heating circuit separator) is an element of central heating system, which is used to separate boiler circuit from heating circuits on the side of heat consumers. It allows the individual circuits to operate independently - the pumps in these circuits do not interfere with each other, and the pressure and flow in each circuit are stable. Hydraulic coupling looks like a vertical cylindrical tank with several connection spigots. Although it is a rather simple device, it can solve many problems in medium and high power installations, especially those with multiple heating circuits and several heat sources. In this article, we explain how a hydraulic clutch works, its design and functions, when it is worth using it, and what mistakes to avoid when selecting it. At the end, we also present a diagram of an example installation with a clutch and a summary with practical tips.

How to choose the right diaphragm vessel for your heating system? - step-by-step guide to selecting an expansion tank

Wed, 12 Mar 2025 00:00:00 GMT

The diaphragm vessel (a.k.a. diaphragm expansion tank) is a key element in protecting heating, cooling and hot water systems from excessive pressure rise. Its construction is a steel tank divided inside by a flexible diaphragm (diaphragm) into two chambers: water and gas (usually filled with compressed air or nitrogen). This design allows it to take on the increased volume of water that occurs due to thermal expansion - when the water in the system heats up, its volume increases and the membrane flexes, allowing some water into the tank and keeping the pressure within safe limits . As a result, the system works properly, and the safety valve does not drop water every time it gets hotter.

How to choose a circulation pump for central heating - what to pay attention to?

Tue, 11 Mar 2025 00:00:00 GMT

The selection of a central heating circulation pump can be crucial to the proper operation of the entire heating system. A poorly chosen pump can result in underheated rooms, excessive noise or high electricity bills. In this article, we will present how to select a circulating pump in two parts: first an accessible introduction for less advanced users, and then detailed technical aspects for those who want to delve deeper into the topic.

Reflex Greenbox - changing the approach to improving the quality of the refrigerant in installations

Wed, 05 Mar 2025 00:00:00 GMT

Every heating and cooling system requires the right quality of working medium to operate efficiently and without failure. Air, contaminants and improper water quality can lead to a number of problems - from reduced system efficiency to accelerated component wear and tear. Reflex Greenbox is one of the most advanced solutions that allows automatic control and optimization of the quality of the refrigerant, ensuring stable and efficient operation of the plant.

How does the filter-demulsifier work? Differences between a mesh filter and a filter-demulsifier

Wed, 05 Mar 2025 00:00:00 GMT

In modern heating and cooling systems, the quality of the working medium, i.e. the water circulating in the system, plays a key role. Solid contaminants, sediment and ferromagnetic particles can significantly reduce the performance of the entire system, leading to costly failures. That's why there is an increasing use of filter-demulsifiers - devices that effectively eliminate the problem of contamination in hydraulic systems. How they work and how they differ from classic mesh filters? We invite you to read.