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Gas Appliances

Exam revision materials for Plumbing Level 2&3 and ACS Gas Safety test

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Gas Fires

Installation Requirements

Positioning

  • Open-flued or flueless appliances MUST NEVER be installed in bathrooms or shower rooms
  • Open-flued or flueless appliances over 12.7kW net MUST NOT be fitted in a room used for sleeping
    • except those less 12.7kW net with ASD since January 1996
  • Gas fires and stoves:
    • Min 225mm height to the burner from the carpet for wall mounted
    • Min 300mm height to the burner from the carpet for floor mounted
    • Hearth:
      • Non combustible material
      • Min thickness of 12mm
      • Min 300mm extend from the back plane
      • Min 150mm extend from the side of the burner
      • Min 500mm from the side wall to the burner
  • Wall heaters
    • Min 150mm from the side wall to the warm air outlet
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Flue and Ventilation

  • Flueless appliances
    • Catalytic flueless heater can be fitted anywhere within the property
  • Cooler plate is required when a fire is installed onto a pre-cast flue
  • Thoroughly sweep a chimney if it was used for a solid fuel appliance befor installation a gas appliance
Minimum permanent opening free area for flueless appliances
Type of Appliance Max Heat Input (net) Room Volume (m3) Vent Size (cm2) Openable Window
Space heater in a room 45W/m3   100 plus 55/kW (if > 2.7kW net) Yes
Space heater in an internal space (hallway) 90W/m3   100 plus 27.5/kW (if > 5.4kW net) Yes
Space heater (BSEN446) in a room 50W/m3 >15 25/kW with a minimum 50 at high and low level Yes
Space heater (BSEN446) in an internal space 100W/m3 >15 25/kW with a minimum 50 at high and low level Yes
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Closure Plate

Closure plate
  • designed for specific fires
  • sealed to the fireplace with heat proof tape (up to 100°C)
  • includes a 'relief opening'
  • the flue service only one room
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Gas Supply

  • Can be taken from 'restricted elbow'
    restricted elbow
  • 8mm tube from the restrictor to the inlet of the fire (union type joint)
  • Make sure there is a gas tap for shutting of the appliances
  • Any gas pipe must be suitably protected by coating or wrapping if it buried in a structure
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Hearth

  • project at least 300mm in front
  • project at least 150mm beyond each side
  • project at least 300mm from all sides for free standing appliance
  • MIN hearth thickness - 12mm
    • MAX 80°C - underside
< Go Back2013-04-09