The following publications support the delivery of each scheme. Full of clear information and useful diagrams, they are excellent for training or handy reference on site.

You can purchase publications online or order them by contacting your customer co-ordinator on 0344 994 4020.



  • CHOSG1 Domestic Gas Safety On Site Guide (parts 1 and 2)
  • CHOSG2 Commercial Gas Safety On Site Guide (parts 1 and 2)
  • CHOSG3 Liquefied Petroleum Gas Safety On Site Guide (natural gas to LPG changeover)
  • G99 Intermediate Gas Certificate Portfolio Pack



  • EE02 Solar Water Heating
  • EE04 Heat Pump Installer Manual



  • E1 BS 7671: Requirements for Electrical Installation
  • E3 Electrical Installation Pack
  • E18 Combination Boilers MS Powerpoint Presentation CD
  • E23 Essential Electrics
  • E24 Central Heating Controls Pack
  • E25 Combination Boilers Pack
  • E29 Basic Refrigeration System Electrics Pack



  • W1 Unvented Hot Water Storage Systems



  • R1 Safe Handling of Refrigerants including Pipework & Brazing
  • R3 Safe Handling of Anhydrous Ammonia Pack