Flammability Tests and Ratings
UL Flammability Test
Test BTU/hr – Locations
UL 1581 (VW-1)
Bunsen Burner
Residential & Non-Residential in Conduit
UL 1581 (Vertical Tray)
70,000 (IEEE 383)
General Purpose
UL 1666 (Vertical Chamber)
527,500
Riser and General Purpose
UL 910 (Steiner Tunnel)
320,000
Plenum, Riser, General Purpose
UL VW-1 Vertical Wire Flame Test
The purpose of the UL VW-1 Ve...
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