Bottom line
Both Breville ovens list a 21.4 in W × 17.3 in D × 12.7 in H exterior. The Smart Oven Air Fryer Pro lists 4 in side and 6 in overhead clearance and is No for an 18-inch cabinet; Joule has no published clearance data, so cabinet fit cannot be confirmed either way.
Cooks comparing the published counter and upper-cabinet fit information for two Breville ovens.
You need a confirmed cabinet-clearance answer for the Joule from the currently published data.
Both Breville ovens publish the same exterior dimensions: 21.4 in wide, 17.3 in deep, and 12.7 in high. The difference is in the clearance record, not the exterior footprint.
The Smart Oven Air Fryer Pro has published 4 in side and 6 in overhead clearance and is a No for an 18-inch upper cabinet. The Joule has no published clearance values in the supplied record, so its fit cannot be confirmed either way.
Same exterior size, different cabinet-fit answer
Matching exterior dimensions do not resolve cabinet fit. The Smart Oven result is No; the Joule result is Cannot confirm because its clearance figures are not published.
Breville Smart Oven Air Fryer Pro
Breville publishes a 21.4 in width, 17.3 in depth, and 12.7 in height for the Smart Oven Air Fryer Pro. Those are the same exterior dimensions published for the Joule Oven Air Fryer Pro.
For the Smart Oven, the manufacturer lists 4 in of side clearance and 6 in of overhead clearance. Its fully open height and rear clearance are not published. Its published cabinet-fit conclusion is No for an 18-inch upper cabinet.
Published cabinet-fit details
- Exterior: 21.4 in W × 17.3 in D × 12.7 in H.
- Fully open height: Not published; rear clearance: Not published.
- Side clearance: 4 in; overhead clearance: 6 in.
- Fits under an 18-inch cabinet: No.
- Source: Manufacturer source, Manual.
Breville Joule Oven Air Fryer Pro
The Joule Oven Air Fryer Pro publishes the same exterior dimensions: 21.4 in width, 17.3 in depth, and 12.7 in height.
The supplied manufacturer record does not publish fully open height or rear, side, or overhead clearance. Its fit under an 18-inch upper cabinet cannot be confirmed either way.
What the published record confirms
- Exterior: 21.4 in W × 17.3 in D × 12.7 in H.
- Fully open height: Not published.
- Rear, side, and overhead clearance: Not published.
- Fits under an 18-inch cabinet: Cannot confirm.
- Source: Manufacturer source.
Current guide pick
Breville Joule Oven Air Fryer Pro
For a second oven
Video: Breville's own product video
Published dimensions and clearance
Both exterior records are identical. Only the Smart Oven source publishes side and overhead clearance; the Joule record does not publish any of these clearance figures.
| Detail | Breville Smart Oven Air Fryer Pro | Breville Joule Oven Air Fryer Pro |
|---|---|---|
| ASIN | B01N5UPTZS | B0BYFR7T23 |
| Exterior width | 21.4 in | 21.4 in |
| Exterior depth | 17.3 in | 17.3 in |
| Exterior height | 12.7 in | 12.7 in |
| Height fully open | Not published | Not published |
| Rear clearance | Not published | Not published |
| Side clearance | 4 in | Not published |
| Overhead clearance | 6 in | Not published |
| Fits under an 18-inch cabinet | No | Cannot confirm |
| Source | Manufacturer source, Manual | Manufacturer source |
What the published cabinet-fit data can support
Smart Oven Air Fryer Pro: No under 18 inches
Its published 12.7 in height and 6 in overhead clearance accompany a No result for an 18-inch cabinet. The 4 in side clearance is also published; rear clearance and fully open height are not.
Joule: fit cannot be confirmed
Its exterior dimensions match the Smart Oven, but rear, side, and overhead clearance and fully open height are not published. Matching body dimensions do not confirm either cabinet-fit outcome.
Keep the two conclusions separate
The Smart Oven has a published No. For Joule, Cannot confirm is the only supported cabinet answer with the available data.
For the broader toaster-oven shortlist, see the toaster ovens worth giving counter space to.
Questions, answered
Do the Breville Joule and Smart Oven Air Fryer Pro have the same exterior dimensions?
Yes. Both list 21.4 in width, 17.3 in depth, and 12.7 in height.
Does the Breville Smart Oven Air Fryer Pro fit under an 18-inch cabinet?
No. Its published cabinet-fit result is No; the record lists 4 in side clearance and 6 in overhead clearance.
Can the Breville Joule Oven Air Fryer Pro fit under an 18-inch cabinet?
The available information does not confirm either outcome. Fully open height and rear, side, and overhead clearance are not published for the Joule in the supplied record.
What sources are listed for each oven?
The Smart Oven entry lists Manufacturer source and Manual. The Joule entry lists Manufacturer source.