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. Author manuscript; available in PMC: 2018 Oct 23.
Published in final edited form as: J Int Soc Respir Prot. 2018;35(1):1–13.

Table III.

Flammability Class of N95 Filtering Facepiece Respirator (N95 FFR), Surgical N95 Respirator (Surgical N95), Surgical Mask (SM), Head Cover and PAPR Hoods

Respirator and other PPE NIOSH TPI
Model Burn Time (sec) Flammability Class Model Flammability Test Result Flammability Class
N95 FFR 11 DNI Class 1 5 DNI Class 1
Surgical N95 7
1		 DNI
7.8		 Class 1 ND ND ND
SM 3
2		 DNI
5.7 - 6.3		 Class 1 ND ND ND
Surgical Head Cover 5 DNI Class 1 ND ND ND
PAPR Hood 1
3
1		 DNI
IBE
10.3		 Class 1 ND ND ND

TPI – Third Party Independent Laboratory

DNI - did not ignite; IBE - ignited but extinguished; ND - not determined