Image of a condensate trap used in a condensing boiler.

In Condensing Boilers, this component is placed between the primary heat exchanger and the drain line, and it prevents the exhaust gases from discharging into the condensate drain pipe.

Image of a flow meter used in a modern boiler

Compared to the early models of Rapid Boilers, which featured a flow switch and thus required a certain water flow rate to produce domestic hot water, manufacturers have equipped modern boilers with a new, more precise mechanism for detecting DHW demand.

Image of a disassembled boiler from a storage heating system.

In Storage Boilers of any type, there is a reserve of sanitary water already at temperature and ready for use. The boiler keeps it hot, thus reducing ignition times and increasing the responsiveness of the domestic hot water system.

Image of an air pressure switch used in boilers.

In the low-efficiency type C boiler, the air pressure switch detects the operation of the flue fan (exhaust fan). It consists of two tubes connected to the venturi ports of the extractor, functioning as pressure and vacuum sensors.

Image of a sanitary safety valve used in boilers and water heaters.

Before 1994, boilers were equipped with this type of valve for safety in the water supply circuit. Today, modern storage boilers integrate this valve into the cold water inlet group within the boiler.

Circulator in Heating System

A modulating circulator is a device used in heating systems to regulate the flow of hot water within radiators. It operates by adjusting the water flow to match the actual heat demand of the environment, thereby reducing energy consumption and improving system efficiency.

Image of a blue pilot light inside a boiler, demonstrating a small constant flame.

The boiler's pilot light is a small constant flame that burns continuously and serves to keep the boiler burner operating. Essentially, the pilot light ignites the main burner whenever it is necessary to heat the water inside the boiler.

Heating safety valve illustration showing essential pressure control mechanism in boiler systems

This component is essential for the proper functioning of the boiler. The heating safety valve is used to control excess pressure; once a certain limit is reached, it begins to release.

Sanitary expansion tank in boiler with storage

The sanitary expansion vessel in storage boilers is essential when there is a significant storage capacity. As the water in the tank heats up, it expands in volume. This component reduces the load on the safety valve of the sanitary system.

Fill valve for heating system, shown in open position, essential for maintaining optimal pressure.

Usually placed under the boiler, it is a faucet that bridges between the water main and the heating circuit. It is used to charge the system to a pressure of 1.2 bar / 1.5 bar.

Motorized three-way valve in a modern boiler system, essential for efficient water flow control.

The diverter valve, also known as a three-way valve, is a crucial component of modern boilers. Its task is to direct the heat produced by the generator towards the heating system or the production of Domestic Hot Water (DHW). The valves can be categorized into two main types: Pressure Static and Motorized.