Artefacts
Interactive artefacts
Cutaways and simulations of the equipment, tests and procedures in the syllabus. Planned artefacts are shown so you can see what's coming and where it fits.
7 of 44 live
Track 1
Foundations
M01Gas safety legislation & the industry
M02Properties of gas & combustion
M02LiveAir, gas and the products of combustion
Starve the flame of air and watch carbon monoxide appear among the products of combustion.
- M02Artefact pending
Pre-aerated burner and flame picture
A pre-aerated burner: adjust primary air and gas pressure and watch the flame picture change.
- M02Artefact pending
Carbon monoxide exposure and the body
CO concentration and exposure time combine to raise blood carboxyhaemoglobin and produce symptoms.
M03Pressure, flow & measurement
- M03Artefact pending
Manometers on a test point
U-gauge and digital manometer on a test point: standing versus working pressure as appliances fire.
- M03Artefact pending
Pressure loss across an installation
Pressure along an installation as appliances switch on, showing where the losses occur.
- M03Live
Gas rate and heat input calculator
Time the meter test dial and get the gas rate, then the heat input, gross and net.
Free sample
Track 2
Supply & installation
M04Gas supply, meters & regulators
M04LiveEmergency control valve
ECV operation: open and closed positions, handle orientation and labelling.
M04LiveDiaphragm gas meter cutaway
A U6/G4 diaphragm meter cut away to show how the chambers and valves measure volume.
M04LiveDomestic meter regulator
A cutaway regulator showing how the diaphragm, loading spring and valve hold outlet pressure steady as demand changes, how it locks up, and how it fails.
Free sample
M04LiveA complete meter installation
A complete meter installation: ECV, regulator, meter and outlet, with the test point and main protective bonding.
M05Installation pipework & fittings
- M05Artefact pending
Pipe sizing workbench
Build a pipe run, add appliances and see the pressure loss in each section against the limit.
- M05Artefact pending
Pipe sleeved through a cavity wall
A pipe sleeved through a cavity wall, cut away to show the sleeve, the seals and the reason for each.
- M05Artefact pending
Pipes in floors and joists
Pipes under timber and solid floors: where notches and holes may go, and how the pipe is protected.
M06Tightness testing & purging
- M06Artefact pending
Tightness test simulator
Step through a let-by test, stabilisation and tightness test on a domestic installation, then interpret the result, including realistic faults.
- M06Artefact pending
Installation and purge volumes
Pipework and meter volumes visualised, and why the purge volume matters.
M07Equipotential bonding & electrical safety
Track 3
Ventilation, flues & combustion
M08Ventilation
- M08Artefact pending
Room ventilation requirements
Choose an appliance type and rating and see the required free area and vent position in a room.
- M08Artefact pending
Compartment ventilation
Compartment high- and low-level vents: airflow when they open to the room versus directly outside.
- M08Artefact pending
Extract fans and spillage
A kitchen extract fan pulling products of combustion back down an open flue.
M09Chimneys & flues
- M09Artefact pending
Room-sealed balanced flue
A concentric balanced flue: combustion air in, products out, and why the room air isn't involved.
- M09Artefact pending
How an open flue works
An open-flued appliance cut away: the stack effect, the draught diverter, and spillage when the flue is blocked.
- M09Artefact pending
Flue terminal positions
A house elevation with terminal clearance zones: drag a terminal and see which rules it breaks.
- M09Artefact pending
Flue flow test
A smoke-pellet flue flow test, with pass and fail cases such as leaking joints and a blocked terminal.
- M09Artefact pending
Spillage test
A smoke-match spillage test at the draught diverter, with doors and fans in different states.
M10Combustion performance & CO
- M10Artefact pending
Flue gas analyser
Probe in the flue: readings change with the appliance's condition, and the learner interprets the ratio.
- M10Artefact pending
Carbon monoxide build-up in a room
CO building up in a room over time when an open flue spills.
- M10Artefact pending
CO alarm siting
Where to site a CO alarm relative to the appliance, the ceiling and obstructions.
Track 4
Appliances & controls
M11Gas safety devices & controls
- M11Artefact pending
Thermocouple flame supervision device
Heat produces millivolts, the magnet holds the valve open; remove the flame and watch it drop out.
- M11Artefact pending
Flame rectification
AC applied across the flame is rectified to a DC current that proves the flame.
- M11Artefact pending
Multifunctional gas valve
A multifunctional gas valve cut away: solenoids, governor, and inlet and burner test points.
- M11Artefact pending
Atmosphere-sensing pilot
Vitiated air lifts the pilot flame off the thermocouple and shuts the appliance down.
- M11Artefact pending
Air pressure switch and fan proving
Fan, venturi and air pressure switch proving airflow before ignition is allowed.
M12Commissioning, servicing & relighting
- M12Artefact pending
Relighting after a supply interruption
After a supply interruption: test, purge, then relight each appliance in the right order.
- M12Artefact pending
Setting burner pressure
Setting burner pressure at the valve test point against the data plate.
- M12Artefact pending
Gas safety inspection checklist
An interactive gas safety inspection checklist that branches when a defect is found.
M13Domestic appliances
- M13Artefact pending
Heating system layouts
Regular, system and combi heating layouts compared side by side.
- M13Artefact pending
Inside a condensing combi boiler
A condensing combi cut away: heating versus hot water mode, diverter valve, plate heat exchanger and condensate trap.
- M13Artefact pending
Cooker safety features
Cooker flame supervision, stability bracket and flexible connection.
- M13Artefact pending
Gas fires and decorative fuel effect fires
Gas fire and decorative fuel effect fire: the flue, catchment space and closure plate.
Track 5
Safety & professional practice
M14Unsafe situations & emergencies
- M14Artefact pending
Responding to a smell of gas
A reported smell of gas: walk through the emergency actions in a property, room by room.
- M14Artefact pending
Unsafe situation classifier
Scenario cards: decide whether each finding is Immediately Dangerous, At Risk or not unsafe, and choose the required actions.