Crispi 4-in-1 Portable Glass Air Fryer Cooking System vs Wonder Oven 6-in-1 Air Fryer Toaster Oven: which is safer?
Ninja Crispi 4-in-1 Portable Glass Air Fryer Cooking System is our pick: better on PFAS and on the overall hazard picture.
Our pick
Ninja
Crispi 4-in-1 Portable Glass Air Fryer Cooking System
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleThermal fracture or stress in glass cooking vessel
PossiblePlastic housing off-gassing (VOCs and formaldehyde)
PossibleElectrical hazard or heating element degradation
Our Place
Wonder Oven 6-in-1 Air Fryer Toaster Oven
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleTeflon-type coating fume risk (thermal degradation)
PossibleCoating degradation and microparticle ingestion
PossibleCeramic coating brittleness (if applicable)
Where these two actually differ
- We flag Thermal fracture or stress in glass cooking vessel, Plastic housing off-gassing (VOCs and formaldehyde) and Electrical hazard or heating element degradation on the Ninja and not on the Our Place.
- We flag PTFE fume risk (thermal degradation), Coating degradation and microparticle ingestion and Ceramic coating brittleness (if applicable) on the Our Place and not on the Ninja.
- The Ninja is Glass cooking vessel with stainless steel and plastic components where the Our Place is Stainless steel exterior, nonstick interior coating (unspecified type), which is most of the difference in these two grades.
- These two are 5 points apart, close enough that price and fit should decide it rather than our grade.
- We are less certain about the Our Place grade, at 35% confidence against 75%, because it discloses less.
Both products run through the same public rubric: materials, coatings, brand disclosure, lab findings, and recalls, plus a beyond-PFAS hazard analysis. Grades are model-based estimates, not lab tests. How grades work →
More air fryers: see the full ranking