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.

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.

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.

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.

Fluorinated gases are gaseous chemical compounds containing fluorine, carbon, and sometimes other elements like chlorine, hydrogen, or bromine. They are commonly used as refrigerants. These refrigerant gases can also be known as hydrofluorocarbons (HFCs), chlorofluorocarbons (CFCs), perfluorocarbons (PFCs), and hydrochlorofluorocarbons (HCFCs).

The cast iron radiator, or cast iron heater, has excellent thermal inertia properties and is well-suited for use with condensing boilers. It requires low operating temperatures, allowing the condensing boiler to modulate significantly, entering the condensation range.

Underfloor heating is a type of distribution that spreads heat evenly throughout the rooms where it is installed. It requires different operating temperatures compared to cast iron or aluminum radiator systems.

The water meter in a residence is an indispensable tool for the supplier company to account for water consumption for a user.