A wall-mounted boiler heats domestic water and radiators simultaneously by igniting the burner and circulating water through a heat exchanger.

Pressure loss usually occurs due to water leakage, air in the heating circuit, or a faulty expansion tank, and should be inspected by a qualified technician.

Regular maintenance, proper temperature settings, good home insulation, and using a room thermostat can significantly lower gas usage.

It’s recommended to have the boiler serviced at least once a year, preferably before the cold season, to ensure safe and efficient operation.