What's New

Updated questions and answers on Gas Reg's and Sizing

App Description

ACS certificate is required to join the ‘Gas Safe Register’

Core Domestics Gas Safety App CCN1 will help beginners and re-assessments for experienced gas installers that need to keep their ACS qualifications up to date.

-The App contains hundreds of multiple choice questions similar to what you will find in the real world ACS exams.

-Practice as many times as required with no internet connection required after initial install.

-Works on both iPhone and iPad, install on both devices at no extra cost.
The Core Domestic Gas Safety (CCN1) app includes CPA1 (Combustion Performance Analysis)

The Exam content covers

-Gas safety, legislation and standards
-Gas Rates
-Tightness testing and purging
-Installation of pipework and fittings (pipework within meter -installation and outlet pipework)
-Gas emergency
- Gas Characteristics
-Products and characteristics of combustion
-Ventilation
- Fluing Standards
-Gas Controls
-CPA1
-Re-establish existing gas supply and re-light appliances


This product is not affiliated with nor endorsed by the ACS.

iPhone Screenshots

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Core Domestic Gas Safety CCN1 screenshot 1 Core Domestic Gas Safety CCN1 screenshot 2 Core Domestic Gas Safety CCN1 screenshot 3 Core Domestic Gas Safety CCN1 screenshot 4 Core Domestic Gas Safety CCN1 screenshot 5

iPad Screenshots

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Core Domestic Gas Safety CCN1 screenshot 6 Core Domestic Gas Safety CCN1 screenshot 7 Core Domestic Gas Safety CCN1 screenshot 8 Core Domestic Gas Safety CCN1 screenshot 9 Core Domestic Gas Safety CCN1 screenshot 10

App Changes

  • July 14, 2020 Initial release
  • October 23, 2020 New version 1.5
  • October 23, 2020 Price decrease: $14.99 -> $13.99
  • December 09, 2020 New version 1.6