Is UL499 Listing Required?
This depends on your local code authority.
While not usually required in residential settings, some public buildings (like schools) may require it. If you're buying a kiln for a public or institutional space, check with your local code inspector to be sure.
What is a testing laboratory?
UL = Underwriters Laboratories
MET = MET Laboratories
Both are independent, Nationally Recognized Testing Laboratories (NRTLs) that certify products to safety standards. UL is the most well-known, but all NRTLs carry equal weight in regulatory acceptance.
What is the UL499 standard?
UL499 covers electrical and fire safety standards specific to kilns, including wiring, temperature limits, failure modes, and more.
Certifications like UL or MET show that a kiln meets minimum national safety standards—especially important in institutional settings.
c-MET-us means the product is certified for both Canada ("c") and the U.S. ("us").
Why are some kilns not listed?
Each kiln model series must be tested individually—a process that is costly and time-consuming. For some models, especially low-volume ones, certification isn’t economically feasible.
However, all L&L kilns are designed to meet UL499 and National Electrical Code standards as we interpret them.
