CKR1 covers domestic gas cooking appliances, and the whole module makes more sense once you hold on to one idea: a cooker is a flueless appliance. Its products of combustion go into the room, so the room, its ventilation and the way the appliance is fixed and connected are all part of the safety judgement — not just the burners.
CKR1 is the cooking-appliance ticket: siting, connection, stability, ventilation and flame supervision around an appliance that flues into the room.
What CKR1 covers
The scope is domestic cooking appliances: freestanding cookers, hobs, built-in and built-under ovens and grills, and range-style appliances. As with every ACS module, the certificate scope and your registered categories decide what work you can actually take on — a cooking-appliance ticket is not a boiler ticket.
Think flueless first
Because combustion products discharge into the kitchen, the room itself has requirements. The revision shape: the room normally needs an openable window or equivalent opening direct to outside air, and smaller rooms can need additional permanent ventilation on top. Extract hoods and fans help the room in use, but they do not replace the requirements — and a fan can even affect other open-flued appliances nearby, which is why cooker questions sometimes cross into spillage territory.
The exact room-volume and vent-size figures come from the current ventilation standard and your training route; the exam skill is recognising when a room fails the principle: no opening to outside, a very small volume, or a vent that has been blocked because of draughts.
Siting, stability and connection
- Freestanding cookers need a stability device — the chain or bracket that stops the appliance tipping when a child stands on an open oven door. Reconnecting a cooker and leaving the restraint off is a classic exam wrong-answer.
- Flexible connections are made with the correct hose and a self-sealing bayonet fitting, routed so the hose cannot rest against hot surfaces, and long enough for the appliance to be pulled out without strain.
- Clearances to combustibles matter above and beside the hob — manufacturer instructions set the figures, and adjacent worktops, shelves and curtains are the usual traps.
- Location logic: cooking appliances have restrictions in rooms such as bathrooms and bed-sitting rooms — treat "can this appliance live in this room at all?" as the first check.
Flame supervision on cooking appliances
Newer domestic cookers and hobs are generally fitted with flame supervision on the burners; many older appliances still in service are not. Some settings — boats and residential park homes are the taught examples — carry stricter flame-supervision expectations, so the safe exam answer checks the current requirements for the installation type rather than assuming one rule for every kitchen.
Commissioning and checks
- Prove the installation first: tightness, then the appliance connection.
- Check operating pressure or gas rate where the instructions call for it, and confirm every burner ignites cleanly and shows a stable flame picture.
- Prove flame-supervision behaviour where fitted — burners should not keep passing gas without a proven flame.
- Confirm grill and oven operation, including any lid cut-off device on appliances that have one.
- Hand over: show the user the controls and leave the instructions with the appliance.
Common exam traps
- Treating a cooker like a flued appliance and forgetting the room requirements.
- Ignoring the missing stability restraint because "it was like that before".
- Accepting any flexible hose rather than the correct type, routed safely.
- Assuming an extractor hood satisfies the ventilation requirement by itself.
- Leaving an appliance without proving flame supervision or demonstrating the controls.
Quick answers
Does a room with a gas cooker need a window?
The taught rule is an openable window or equivalent opening direct to outside air, with smaller rooms potentially needing additional permanent ventilation. The exact figures come from the current ventilation standard for cooking appliances.
Do gas hobs need a flame supervision device?
Newer domestic hobs are generally fitted with flame supervision, and some settings such as boats and park homes carry stricter expectations. Many older cookers in service have none — which is a condition to assess, not to ignore.
Can I install my own gas cooker?
No. Cooker installation and connection is gas work — in domestic premises it belongs with an appropriately qualified, Gas Safe registered engineer whose categories cover cooking appliances.
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