ACS appliance assessment
ACS CENWAT: Water heating and wet central heating
Taken with CCN1 by engineers who work on boilers (traditional, system and combination) and water heaters, up to 70 kW.
The module
The appliance group is taken from City & Guilds' quick guide to qualifications and Gas Safe Register competence categories (version 5.0, December 2023), which names the group each qualification's categories cover, and the City & Guilds 9074-03 handbook (version 3.1), which gives the 70 kW limit. The title here is a plain description, not the official ACS title. ACS appliance assessments are taken alongside the core assessment (CCN1); check your certification body's documents for the exact scope.