The Vokera part is located around the fan section. The fan is the part that pushes fresh air into the combustion chamber, allowing the gas to be burnt correctly. It also clears the burnt gas after the combustion process is complete. The boiler has a safety feature.
Fits multiple appliances
Technical specification
Manufacturer Model No10027559Brand NameVokeraCompatible WithCompact 25 HE, Compact 29 HE, Sabre 25 HE, Sabre 29 HE and Sabre 29 HE System