Chem-Pruf fiberglass fire rated doors systems have been tested, approved and labeled for both neutral and positive pressure by Warnock-Hersey (WHI).
Neutral Pressure Fire Doors - Chem-Pruf Fiberglass Door Systems are approved for neutral/negative pressure and tested for 45 minutes, 60 minutes and 90 minutes. Chem-Pruf FRP door systems (door and frame) are labeled by Warnock-Hersey (WHI).
Positive Pressure Fire Doors - Chem-Pruf Fiberglass Door Systems are also approved for positive pressure and are tested for 45 minutes, 60 minutes and 90 minutes with UBC 7-2-1997 and are labeled like our negative pressure doors. In addition, Chem-Pruf FRP door systems meet UL 10c NFPA 252.
Door Panel - The FRP fire rated doors are 1-3/4" thick with flush, seamless construction and are manufactured using chemically proven fire retardant resins. Every Chem-Pruf product is custom manufactured to the highest manufacturing standards and strict quality control and are guaranteed for life against failure due to corrosion.
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