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|Stetzerizer Products are UL Listed - Immitators are NotFrom the beginning, Dave
Stetzer of Stetzer Electric (founded in 1974) and Dr. Martin Graham,
PhD., Professor Emeritus, U.C. Berkeley knew that their products should
be UL approved for safety reasons, and insurance and liability reasons.
When properly designed, capacitor-based filters like the Stetzerizer
products are very safe an effective. If not properly designed, the
products could pose serious health and safety concerns.
first filter of its kind to go through UL testing - and to this day the
ONLY filter of its kind to pass - the Stetzerizer products set the bar
very high. Drop testing, baking in ovens for weeks, thousands of volts
passed through, and purposely being lit on fire (among many other
tests), Underwriters Laboratories guaranteed that Stetzerizer products
are as safe as any other household appliance/device bearing UL approval.
you know that most insurance policies for homes require that all of
your electrical devices be UL approved? Did you know that if you
purchased an off-brand copycat filter that is NOT UL approved and it
started a fire in your home, your insurance provider will likely not
cover any of the damage? This is yet another reason why it was so
important for Stetzerizer filters to go through the incredibly expensive
process of getting approved.
Stetzerizer products are tested
regularly straight from the factory, and even the factory itself is
routinely inspected to make sure quality and safety always goes into
every unit. It was and continues to be very expensive for Stetzerizer
to maintain the UL rating, but they've done so from the start because it
is the right thing to do.
If you have any questions about it,
please ask us. Remember that no other filter on the market has UL
approval. If they did, they would be displaying the UL approval logo on
their products !! We have also heard numerous reports of copycat
filters claiming to be UL approved and even providing erroneous UL file
numbers. So don't believe what they say - look for the logo on each
Stetzerizer has it!!!
Stetzerizer Single Filter: file number E242189 (US) (CA) registered to Stetzer Electric certified in USA and Canada
Stetzerizer Microsurge Meter: file number E331470 (US) (CA) registered to Stetzer Electric certified in USA and Canada