According to UL 1950, sub clause 4.4.3.6, foam air filters must meet the
flammability of Class V2 or better, or HF-2 or better. This rating in
accordance with UL 94. Recently one of our suppliers has suggested the use
of Class 2 filter material in accordance with UL 900 flammability.
Additionally I have been told that filters that comply with Class 2
requirements are considered to meet the requirements of sub clause 4.4.3.6.
My questions are:
1. Is Class 2 similar to V-2 or HF-2?
2. Can UL 900 Class 2 filters be used to satisfy sub clause 4.4.3.6?
3. Is UL 900 "Performance of Air filters" applicable to ITE equipment per
UL 1950?
Thanks
Rick Busche
rbus...@es.com
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