Affiliate Disclosure: This post contains affiliate links. If you purchase through my links, I may earn a small commission at no extra cost to you. I only recommend products I’ve personally researched and trust for my own family.
Is Instant Pot Omni Plus PFAS free? It’s the question I kept running into when researching large-capacity air fryers for our family — because at 18 liters, this is the kind of appliance you cook in every single day, and the coating question matters more, not less, at that frequency.
I went through the manufacturer specs, the cooking surface materials, and what the research actually says about the surfaces used in the Omni Plus before I put it in our kitchen. Here’s the straightforward answer.
What Instant Pot Says About the Omni Plus Cooking Surfaces
The Instant Pot Omni Plus 18L uses stainless steel as its primary cooking surface material. The interior of the unit — the walls, the back panel, and the main oven cavity — is stainless steel. The included cooking trays and the air fryer basket are also stainless steel.
Instant Pot does not list PTFE, Teflon, or any fluoropolymer-based nonstick coating in the Omni Plus cooking surface specifications. The stainless steel designation is consistent across their product documentation and is the primary reason the Omni Plus is categorized as a PFAS-free option in non-toxic cookware comparisons.
That’s the manufacturer position. The follow-up question worth asking is what stainless steel actually means for cooking performance and safety compared to ceramic or PTFE-coated alternatives.
What Stainless Steel Cooking Surfaces Mean for PFAS Exposure
Stainless steel is an alloy — primarily iron and chromium, with nickel content varying by grade. It does not use polymer coatings of any kind. There is no PTFE layer, no ceramic coating, and no fluoropolymer chemistry involved in the cooking surface.
This makes stainless steel the most straightforward answer to the PFAS question in air fryer cooking surfaces. Where ceramic coatings are PTFE-free but still involve a silica coating applied over metal, stainless steel is simply metal — no coating to degrade, no chemical migration concern associated with coating breakdown at high temperatures.
The trade-off is nonstick performance. Stainless steel is not nonstick in the way PTFE or ceramic surfaces are. Foods with high sugar or protein content can stick to stainless steel without adequate oil or proper preheating. For air fryer cooking, a light spray of avocado oil on the tray or basket before each cook handles this effectively for most foods.
According to EPA guidance on PFAS compounds, the category of concern centers on fluoropolymer-based coatings and their associated manufacturing and degradation byproducts. Stainless steel cooking surfaces fall entirely outside that category of concern.
Is the Instant Pot Omni Plus Truly PFAS Free?
Yes — based on the stainless steel cooking surface designation, the absence of any fluoropolymer coating in the product specifications, and the chemical properties of stainless steel itself. The Omni Plus does not use PTFE, does not use PFAS-associated nonstick coatings, and the stainless steel surfaces do not degrade at air fryer cooking temperatures in ways that produce chemical migration concerns.
It’s worth noting one nuance: some Instant Pot Omni Plus accessories sold separately — silicone mats, additional trays from third-party manufacturers — may use different materials. The PFAS-free designation applies to the cooking surfaces included with the unit as sold. Third-party accessories should be verified independently.
The Instant Pot Omni Plus cooking tray — stainless steel surface, no polymer coating, no PFAS concern at any cooking temperature.
Instant Pot Omni Plus 18L Specs at a Glance
| Spec | Detail |
|---|---|
| Capacity | 18 liters (approximately 19 quarts) |
| Cooking surface | Stainless steel (PTFE-free, PFAS-free) |
| Cooking functions | Air fry, bake, broil, roast, toast, dehydrate, warm, rotisserie |
| Temperature range | Up to 450°F |
| Included accessories | Air fry basket, baking pan, cooking rack, rotisserie spit and forks |
| Best for | Families of 4+, batch cooking, full meals, replacing multiple appliances |
How the Omni Plus Performs for Family Cooking
The 18-liter capacity is the primary reason families choose the Omni Plus over compact basket-style air fryers. At that size, you can air fry a whole chicken, roast a full sheet pan of vegetables, or run enough fish sticks for four kids in a single round — without the batch cooking that compact models require for larger servings.
A few practical observations from extended family use:
Capacity advantage. The flat tray format means you can lay food in a single layer across a genuinely large surface area. For proteins like chicken pieces or fish fillets, this produces more even cooking than stacking in a compact basket. For frozen items like nuggets, fries, and fish sticks, the full-tray approach eliminates the multiple-batch problem entirely for family portions.
Stainless steel cooking behavior. Stainless steel requires a light oil spray before each cook for most foods. Without it, proteins with natural sugars — shrimp, salmon with glazes, chicken thighs — will stick. With a light avocado oil spray, the stainless surface performs well and cleanup is straightforward.
Multiple cooking functions. The Omni Plus replaces a toaster oven, air fryer, dehydrator, and rotisserie in a single unit. For families with limited counter space who need versatility, that consolidation is a meaningful practical advantage over having multiple single-function appliances.
Preheat time. The larger cavity takes longer to preheat than a compact basket air fryer — typically 5–8 minutes versus 3 minutes for a compact model. For weeknight cooking where speed matters, this is worth knowing in advance.
The Instant Pot Omni Plus 18L handles full family meals in a single round — stainless steel surfaces, no PFAS concern, enough capacity for four or more.
Omni Plus vs Compact Ceramic Air Fryer: Which Is Right for Your Family
| Factor | Instant Pot Omni Plus 18L | Ninja AF150AMZ (4qt) |
|---|---|---|
| Cooking surface | Stainless steel | Ceramic-coated |
| PFAS-free | ✅ Yes | ✅ Yes |
| Capacity | 18L — full family meals | 4qt — 1–3 people |
| Nonstick performance | Requires light oil spray | Good nonstick without oil |
| Preheat time | 5–8 minutes | 2–3 minutes |
| Coating durability | No coating to degrade | Ceramic wears over time |
| Best for | Families of 4+ | 1–3 people, compact kitchens |
For families of four or more cooking full meals daily, the Omni Plus is the stronger choice on capacity and long-term durability. For smaller households or anyone prioritizing counter space and preheat speed, the Ninja AF150AMZ ceramic basket covers the PFAS-free requirement in a more compact format.
Who the Instant Pot Omni Plus Is Right For
The Omni Plus is the right choice for families who need to cook large portions in a single round, want stainless steel cooking surfaces with no coating concerns at any temperature, and are replacing multiple appliances with one unit. The 18-liter capacity, eight cooking functions, and stainless steel surfaces make it the most versatile PFAS-free air fryer option for larger households.
It’s the air fryer I recommend for families of four or more who are cooking proteins, vegetables, and frozen foods daily and need the capacity to do it without batch cooking.
Is Instant Pot Omni Plus PFAS Free: The Bottom Line
Yes — stainless steel cooking surfaces, no fluoropolymer coatings, no PFAS concern at any cooking temperature. It’s the most straightforward answer to the PFAS question of any air fryer in this capacity range, because stainless steel simply doesn’t involve the coating chemistry that the question is asking about.
For a full comparison of PFAS-free air fryer options across different sizes and surface materials, see the main guide on PFAS-free air fryers. If you’re also evaluating the Ninja AF150AMZ ceramic basket option, see the guide on whether the Ninja AF150AMZ is PFAS free for a direct coating comparison. And for a full review of the Omni Plus in daily family use, see the Instant Pot Omni Plus review.