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Gas, Oil and Solid Fuel Appliances and Equipment

With over sixty years of combustion certification experience, UL has the experience and resources to meet all of your gas, oil and solid fuel appliance and equipment certification needs. Testing to UL Standards, ANSI Z21 and Z83 series gas-fired appliance standards, Canadian requirements, or IEC standards for the U.S., Canada or other countries, we can get your products certified in a quick and cost-effective manner.

Select your product type from the navigation menus above or below to get an overview of the specific products we test, how the submittal process works and what UL or ANSI standards apply to specific products.

We are happy to answer any questions you may have about submittals or safety certification and will respond promptly to your inquiry. Fill out our Combustion Inquiry form to direct your question to a combustion product industry staff member.

If you are interested in attending a future UL workshop or if there is a particular topic you would like UL to address in a workshop session, please submit your request using the combustion inquiry form.

Note: For equipment that handles or stores flammable & combustible fluids (including gas & oil), please visit our Flammable & Combustible Fluids (Gas & Oil) pages.