Which Pizza Ovens Are Actually Certified? We Checked the Register
Every oven review on this site is hands-on: someone cooked on the thing. That is the part of a review nobody can fake, and it is not going anywhere. But a manufacturer's own paperwork answers a different question than a chef's recollection does, and on questions of safety and commercial fitness the paperwork is what counts.
So we searched Intertek's Directory of Listed Products - a public, free register - for every brand we test, saved the records with the date, and put the results here. This page is the evidence layer that sits next to the cooking.
What we found
| Brand | Standards in the register | Food-equipment (NSF/ANSI 4) |
| Chicago Brick Oven 750 Hybrid-R (residential) | ANSI Z21.58, CAN/CSA 1.6 - outdoor cooking gas appliances | Yes - NSF/ANSI 4, ETL Sanitation Mark |
| Chicago Brick Oven 750 Hybrid-C (commercial) | ANSI Z83.11, CAN/CSA 1.8 - gas food service equipment | Yes - NSF/ANSI 4, ETL Sanitation Mark |
| CROSSON | UL 197 | Yes - NSF 4, ETL Sanitation Listed Mark |
| Gozney | ANSI Z21.58, ANSI Z83.11, CSA/ANSI Z21.21, CAN/CSA 1.6, CAN/CSA 1.8 | No |
| Ooni | CSA/ANSI Z21.89, CAN/CSA 1.18 | No |
| Forno Venetzia | CSA/ANSI Z21.89, CAN/CSA 1.18 | No |
| Breville | UL 1026, UL 250, UL 963, UL 982, UL 1083 (electrical) | No |
| Halo | No verified listing - see the note below | No |
| Bertello | No Intertek listing found | No |
| BIG HORN | No verified listing - the one hit belongs to a different company, as with Halo | No |
Records pulled 10 August 2026 and saved. The register is public: you can check any row yourself.
A correction from Chicago Brick Oven, 10 August 2026. Our first version of this table listed all four gas standards against the brand in a single row. Chicago Brick Oven wrote to point out that they map to two different models, and they are right - the distinction is in the register and we had flattened it. Hybrid-R, the residential outdoor version, is listed to ANSI Z21.58 and CSA 1.6. Hybrid-C, the commercial version, is listed to ANSI Z83.11 and CSA 1.8. Both appear as active listings, and NSF/ANSI 4 covers both. That difference is not pedantry: it is the difference between saying an oven is certified for commercial food service and saying its commercial variant is. This is the third time their team has corrected us and the third time they have been right.
Read this before you read the table
"No Intertek listing" does not mean "not certified." This is the single most important line on the page, and we learned it the hard way - two manufacturers corrected us in one day for treating those as the same claim. Certification to these standards can be issued by any accredited body: CSA Group, UL Solutions, TUV and others all certify to the same published specifications. We searched one register. An oven certified by CSA will not appear in it, and is no less certified.
BIG HORN is the same trap. The single register hit for that name belongs to BIG HORN ELECTRIC AND CONTROLS LTD, listed for industrial control panels and assemblies - an electrical contractor, not the company that makes the 12-inch multi-fuel oven. We have written to BIG HORN asking for their own certification detail rather than publishing an absence we cannot fully stand behind.
The Halo row needs its own explanation, because it is the trap this whole exercise exists to avoid. Searching the register for "Halo" returns three records belonging to HALO INTERNATIONAL SEZC LTD - portable power packs, general-use power supplies, and motor-operated air compressors. That is a different company that shares a word with the oven brand. It would have been easy, and completely wrong, to write "Halo: ETL Listed" from those hits. A brand name is not a company name, and the product class is what settles it.
Which standard applies to which oven
Most confusion here comes from checking for the wrong certificate. We made this mistake ourselves across nine reviews before correcting it.
- Outdoor gas ovens - CSA/ANSI Z21.58, also published as CSA 1.6, "Outdoor cooking gas appliances". This is the one that matters for an Ooni Koda, a Gozney, a Bertello.
- Indoor electric ovens - the UL family. A Breville Pizzaiolo carrying UL 1026 is exactly right for what it is.
- Commercial food equipment - NSF/ANSI 4, evidenced by the ETL Sanitation Mark rather than the ordinary ETL Listed Mark.
- Wood-fired ovens with no electrical or gas parts - frequently nothing applies, and that is not a gap.
Looking for a UL listing on a gas oven with no electrical components, and then reporting its absence, is like checking a kettle for a crash-test rating. The absence is real and it tells you nothing. Nine of our own reviews once carried a badge shaped exactly like that.
If you are buying for a business
Then the food-equipment column is the only one that matters, and it is short. The Chicago Brick Oven 750 Hybrid and the CROSSON Double Deck 16 are the two ovens we have tested that carry sanitation certification. Both are built for it in other ways too - the CBO is an 18-inch refractory hearth that holds temperature through a service, and the CROSSON is a double deck designed for batch output.
Everything else on this site is a home oven, and a home oven without NSF/ANSI 4 is not deficient. It was never intended for a commercial kitchen, and your local health inspector, not us, is the authority on what your premises require.
Why certification is not part of our scores
It would be easy to award points for a certificate, and it would be wrong. Because absence from one register does not prove absence of certification, scoring an oven down for an empty result would punish a manufacturer for the limits of our search rather than for anything about their product. We have already been corrected twice for exactly that error.
So certification is published here as documented evidence, dated and checkable, sitting alongside the review rather than inside the number. If a brand sends us a certificate number, we verify it in the issuing body's own database and update this page with the date - which is a better outcome for them than an empty cell, and a more accurate one for you.
Frequently asked questions
What certification does an outdoor gas pizza oven need?
CSA/ANSI Z21.58 (also published as CSA 1.6), "Outdoor cooking gas appliances" - current edition 2022. That is the standard that actually applies. UL and ETL are the electrical safety family, so looking for a UL listing on a gas oven with no electrical parts and reporting its absence is like checking a kettle for a crash-test rating: the absence is real and it means nothing.
What does NSF/ANSI 4 mean on a pizza oven?
It is the food-equipment sanitation standard - it covers whether a commercial cooking appliance can be cleaned properly and is constructed from materials fit for food service. It is the certification that matters if you are cooking for the public rather than for your family. Most home pizza ovens do not carry it and do not need it.
Which pizza ovens are certified for commercial kitchen use?
Of the ovens we have tested, two carry food-equipment sanitation certification: the Chicago Brick Oven 750 Hybrid (NSF/ANSI 4, ETL Sanitation Mark) and the CROSSON Double Deck 16 (NSF 4, ETL Sanitation Listed Mark). If you are buying for a restaurant, food truck or catering business, that is your shortlist from our testing.
Does no listing mean an oven is not certified?
No, and this is the most important caveat on this page. We search Intertek's public register. Certification to these standards can be issued by any accredited body - CSA Group, UL Solutions, TUV and others all certify to the same specifications. "No Intertek listing" means exactly that, and nothing more. We have been corrected by manufacturers three times for imprecision here, and each time they were right.
Is ETL the same as UL?
They are different testing laboratories certifying to the same published standards. ETL is Intertek's mark; UL Solutions issues its own. An ETL Listed product has been tested to the relevant UL or CSA standard by Intertek. Neither mark is better than the other - what matters is which standard was applied.
What is the ETL Sanitation Mark?
It is Intertek's mark for equipment certified to food-equipment sanitation standards such as NSF/ANSI 4, as distinct from the ordinary ETL Listed Mark, which covers electrical or gas safety. An oven can carry one, both or neither, and they answer completely different questions.
Does certification affect your ratings?
No, deliberately. Because absence from one register does not prove absence of certification, scoring an oven down for it would punish brands for our search limits rather than for their product. Certification is published here as documented evidence alongside the review, not folded into a number.
How often do you re-check the register?
The sweep is on a 90-day cycle, and separately we re-ask every brand for which we published an absence. A brand that certifies after we looked would otherwise stay uncertified on our pages indefinitely - an un-re-asked negative quietly becomes a false claim.
Why does a brand appear in the register under an unrelated product?
Because a brand name is not a company name. A search for "Halo" returns HALO INTERNATIONAL SEZC LTD - power packs, power supplies and air compressors - which is not the company that makes the Versa 16. We match on the company field and on product class for exactly this reason, and we exclude records that are a name collision.
Can I verify these listings myself?
Yes, and you should. Intertek's Directory of Listed Products is public and free to search. Every row below came from it, and the underlying records are saved with the date we pulled them. If you find something we have wrong, tell us and we will correct it with the date.