Leave clear space above and around the appliance, and never cover the air intake or the outlet.
Requirement — Appliance and electrical safety
Leave clear space above and around the appliance, and never cover the air intake or the outlet.
How to tell, without a thermometer
- Nothing resting on top of the appliance while it runs
- A clear gap behind it — the outlet on most machines is at the back
- No wall cupboard directly above with the appliance pushed under it
If it has not got there: Move the appliance out from the wall and away from anything above it before you switch it on. If your worktop has no position with clearance, that is a genuine constraint on where the appliance can be used rather than something to work around.
Important: If the appliance has been run in a confined space and the housing has discoloured, deformed or smells of hot plastic, stop using it and contact the manufacturer. Heat damage to the housing is not cosmetic.
Why this is the rule
An air fryer works by moving a large volume of hot air through a small chamber and dumping it out of the back or top. Blocking that path does two things at once: it stops the appliance cooking evenly, and it stops it losing heat, which is how an appliance that is working correctly ends up overheating. The manufacturers agree that clearance is required and mostly decline to say how much — 'adequate space above and on all sides' is typical. One of them gives a number: at least 13 centimetres around the appliance in use. That is the only measurable figure AirfryerHQ has found, and in the absence of a figure from your own manual it is a far better default than the gap that happens to be left under your wall cupboards.
This outranks any cooking time on this site. Where a cooking recommendation cannot be reconciled with a rule like this one, AirfryerHQ does not publish the recommendation — not with a warning attached, not greyed out, not at all.
Evidence and confidence
- Applies to
- Specific to this type of appliance
- Why this rating
- Three manufacturers across two companies state the requirement in their own manuals, and one of them quantifies it. This is a manufacturer-authoritative domain and the sources are the governing documents for their own appliances.
- Last reviewed
- 2026-08-13
What this does not cover
- The 13cm figure comes from one manufacturer and applies, strictly, to its own appliance. It is offered as a default where your own manual gives no number, not as a general standard.
- Says nothing about built-in ovens with an air-fry mode, which are installed to a different set of clearance requirements entirely.
Sources (3)
Instant Vortex Plus Dual Air Fryer 7.6L — User Manual (PDF)
Instant Brands (EMEA) Limited — Manufacturer manual (United Kingdom and European Union)
Relied on for: The 13cm all-round clearance requirement and the instruction not to block the vents.
States this directly
Passage read and verified
Retrieved 2026-08-13 from instantpot.co.uk
Ninja Foodi MAX Dual Zone Air Fryer AF400UK — Instructions (PDF)
SharkNinja Europe Limited — Manufacturer manual (United Kingdom)
Relied on for: That the air intake vent and air outlet must not be covered while operating, because doing so may cause the unit to overheat, and that adequate space is required above and on all sides.
States this directly
Passage read and verified
Retrieved 2026-08-13 from argos-support.co.uk
Retrieved from Argos's manual library, which mirrors the manufacturer's booklet for Argos product 952/3997. Not retrieved from ninjakitchen.co.uk, whose support portal redirected to an authentication gate.
Instant Vortex Plus VersaZone 8.5L Air Fryer — User Manual (PDF)
Instant Brands (EMEA) Limited — Manufacturer manual (United Kingdom and European Union)
Relied on for: That the appliance releases hot air through vents that must not be covered.
States this directly
Passage read and verified
Retrieved 2026-08-13 from argos-support.co.uk
Retrieved from Argos's manual library for Argos product 124/2568.