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Institute for Environmental Research

Institute for Environmental Research

Kansas State University
0056 Seaton Hall
Manhattan, KS 66506

Phone: 785-532-5620
Fax: 785-532-6642

Fabric Systems: NFPA Total Heat Loss Test



ASTM F 1868 “Thermal and Evaporative Resistance of Clothing Materials Using a Sweating Hot Plate Test” (Procedure Part C)

THL Specification criteria are given in:  NFPA 1951, NFPA 1971, NFPA 1977, NFPA 1992, NFPA 1994, NFPA 1999 


Sweating hot plate in an environmental chamber; custom hoods provide either horizontal or vertical air flow at different levels 


$754 per fabric or fabric assembly (3 reps dry, 3 reps sweating)



Fire fighter turnout gear materials.  See other photos of the plate and air flow hoods under Fabric Systems: Thermal Insulation and Fabric Systems: Evaporative Resistance.