UL vs ETL vs NSF: what the certification marks on commercial equipment mean

Spec sheets for commercial equipment often list UL, ETL, NSF, CE or ENERGY STAR. Only some of those matter to a US inspector. Here’s what each mark covers, who checks for it and how to look up a listing before you buy.

What do UL, ETL and NSF certify?

UL and ETL cover electrical safety, and NSF covers food safety.

Mark	Issued by	What it tells you	Who looks for it
UL Listed	UL Solutions	The complete product meets the electrical and fire safety standard for its type	Electrical inspectors, and employers under OSHA’s workplace rules
ETL Listed	Intertek	Same as UL Listed, tested to the same standard	Electrical inspectors, and employers under OSHA’s workplace rules
NSF	NSF	The equipment meets an NSF/ANSI food sanitation standard: food-safe materials, easy to clean	Health departments
UL EPH or ETL Sanitation	UL Solutions or Intertek	The equipment meets the same NSF/ANSI food sanitation standard	Health departments

A listing also means the lab keeps inspecting the factory, so the units you receive are held to the same standard as the one it tested.

Is ETL as good as UL?

Yes. They’re two different labs testing to the same standards.

OSHA recognizes the labs that can certify equipment for US workplaces, called Nationally Recognized Testing Laboratories (NRTLs). Its current list has 21 of them, including UL, Intertek (the ETL mark) and CSA Group. A listing from any of them counts the same under OSHA’s rules.

A commercial refrigerator gets tested to UL 471 either way. The “UL” in a standard’s name is just the standard’s name, and Intertek tests to it too. Intertek says inspectors and code officials across North America accept the ETL mark as proof of compliance.

So ask the supplier two things: is the complete unit listed, and is it listed under the exact model number you’re buying? You’ll often see a small “c” and “us” next to the mark (cULus, cETLus). That means it’s certified for Canada and the United States.

What does NSF certification mean?

NSF writes a family of food equipment standards, such as NSF/ANSI 2 for food equipment in general and NSF/ANSI 7 for commercial refrigerators and freezers. They’re American National Standards, so other accredited labs certify to them too. UL (its EPH mark) and Intertek (its ETL Sanitation mark) both certify food equipment to NSF/ANSI standards.

Health departments care because of the FDA Food Code, the model food safety code that state and local governments can adopt as their rules. Section 4-205.10 of the 2026 edition says food equipment, utensils and other food-contact surfaces that are “certified or classified for sanitation in conformance to a recognized American National Standard by an American National Standards Institute (ANSI)-accredited certification program are deemed to comply” with its rules on equipment materials, design and construction.

That means equipment certified to the right NSF/ANSI standard, by NSF, UL, Intertek or another accredited program, passes those rules. Without it, you’d have to show the equipment complies some other way, and that’s up to your health inspector. If your local rules say “NSF or equivalent”, the UL and ETL sanitation marks are the equivalent.

Which marks does each type of equipment need?

These are the usual standards for each type of equipment. The listing for a specific model names the standard it was tested to.

Equipment	Electrical or gas safety	Food sanitation
Vending machines	UL 751 (vending machines) or UL 541 (refrigerated vending machines)	NSF/ANSI 25 for machines that sell food or drinks
Micro-markets and smart fridges	UL 471 (commercial refrigerators and freezers)	NSF/ANSI 7
Commercial refrigeration	UL 471	NSF/ANSI 7, and NSF/ANSI 12 for ice machines
Electric cooking equipment	UL 197 (commercial electric cooking appliances)	NSF/ANSI 4
Gas cooking equipment	ANSI Z83.11 / CSA 1.8 (gas food service equipment)	NSF/ANSI 4
Mixers, slicers and other powered prep machines	UL 763 (motor-operated commercial food preparing machines)	NSF/ANSI 8
Stainless prep tables and sinks	None, unless the unit has power	NSF/ANSI 2
Restaurant furniture and store fixtures	None, unless it has lights, power or refrigeration	Not usually

Gas cooking equipment is certified to the US gas food service equipment standard by labs such as CSA Group, UL or Intertek.

Upholstered seating, like padded chairs and booths, falls under a separate federal rule. Upholstered furniture made or imported for the US since June 25, 2021 has to meet a smolder-resistance standard (16 CFR part 1640) and carry a compliance label.

Who checks the marks?

• Your local electrical inspector. Electrical codes require equipment to be approved by the local inspector, known as the authority having jurisdiction. A listing from a recognized lab is the usual basis for that approval, and unlisted equipment can be refused.
• OSHA, if you have employees. OSHA’s rules require employers to use approved electrical equipment, and for the kinds of equipment a recognized lab certifies, approved means listed or certified by one. OSHA points out that these rules apply to employers, not manufacturers or sellers. That puts the responsibility on the business using the equipment.
• Your health department. Under the FDA Food Code, a new or remodeled food business submits plans before it opens, listing its equipment types, manufacturers and model numbers. That’s where sanitation certification gets checked.

Listed or recognized: check the whole unit

UL’s Recognized Component mark, a backward “UR”, goes on parts like compressors, motors and power supplies that get built into a larger product. UL says component recognition isn’t a certification for a complete, standalone product.

If a supplier tells you a machine “uses UL components”, that only covers the parts. Ask for the listing on the complete unit: the lab’s listing mark with a control or file number, usually on the data plate.

How to check a listing yourself

1. Find the data plate. It shows the manufacturer, the model number, the electrical rating and the certification mark, usually with a control or file number. Ask the supplier for a photo of it, and for the certificate, before you order.
2. Search the lab’s directory. Each lab publishes its listings online, free to search:
   • UL: UL Product iQ
   • Intertek (ETL): ETL Listed Mark directory
   • CSA: CSA product listing
   • NSF: NSF certified food equipment search
3. Match the exact model number. A listing covers specific models. A manufacturer can have one model listed and a nearly identical one that isn’t.
4. If you can’t find it, ask. A real listing has a file or control number the lab can confirm. If the supplier can’t give you one, treat the equipment as unlisted.

Marks that don’t count as US certification

• CE is a European mark the manufacturer declares itself. OSHA says the CE mark “is unrelated to the requirements for product safety in the United States.”
• ENERGY STAR is a voluntary EPA program for energy efficiency. It can lower your running costs, but it doesn’t cover electrical safety or sanitation.
• A logo in a product photo or on a box proves nothing by itself. Marks get faked, and UL publishes notices about counterfeit UL marks, so always check the lab’s directory.

How we handle certification

We only sell certified units. Electrical equipment is UL or ETL listed, gas equipment is certified to the US gas food service equipment standard (ANSI Z83.11), and food equipment is certified to NSF/ANSI sanitation standards where required. Your quote names the listings for each model, so you can look them up in the directories above before you pay a deposit. Every order is also inspected at the factory before it ships. How it works covers the full process.

When you’re ready, request a quote with the equipment, quantity and delivery ZIP code, and we’ll confirm the listings for each model.