irtherm Engineering Limited has recently completed a flue installation, working closely with the consultant and contractor at St Bernard’s Catholic School, Birmingham. The flue system selected was the ‘Masterflue’ by Hamworthy. Boilers: Hamworthy Model: Modumax HE Variheat PV105 Application: Chimney / Flue system Operating mode: Dry / Wet Pressure: Negative / positive pressure