ACS Initial (Course code LGTC 2)NICEIC certification ACS Domestic Initial Course (Gas installers who have held the qualifications previously but have let them lapse by more than 12 months, must undertake Gas Safety training and an Initial Assessment Course). Initial CCN1 Included in our price Initial CCN1 (Core Domestic Gas Safety) 5 6 days 2 3 days practical and written training, followed by 2 3 days of assessment covering: Gas safety legislation Gas emergency actions and