Institute for Environmental Research

Fabric Systems: NFPA Total Heat Loss Test

Downloads:

Method:

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

Instrument:

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

Cost:

$765 per fabric or fabric assembly (3 reps dry, 3 reps sweating)

THL

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.