ASHRAE Technical Committee 4.4, Thermal Insulation and Vapor Retarders, would like your input for future editions of this manual. If you would like to submit a completed heat transmission data sheet on an opaque building component (wall, roof, ceiling, or floor) for possible inclusion in the next edition, follow these steps.

1. Tell ASHRAE Technical Committee 4.4 that you wish to submit completed heat transmission data sheet(s). The subcommittee will provide any updated information and advice on how to complete the data sheet. To contact the subcommittee, write to:

   • Heat Transmission Coefficients Manual

   • TC 4.4, Thermal Insulation and Vapor Retarders

   • ASHRAE

   • 1791 Tullie Circle, NE

   • Atlanta, Georgia 30329

2. Perform guarded hot box, ASTM Standard C 236 (1990 or most recent version), or calibrated hot box, ASTM Standard C 976 (1990 or most recent version), tests to determine experimental values of the thermal transmission coefficients of a building component at the following mean temperatures: 25 F, 50 F, and 100 F. See ASTM Standard C 1058 (1990) for the hot and cold temperatures that can be used in the hot box tests. TC 4.4 strongly recommends, but does not require, that you measure thermal conductivities of each of the building materials that are assembled into the building component being tested. Use a guarded hot plate, ASTM Standard C 177 (1990 or most recent version), or a heat flow meter, ASTM Standard C 518 (1990 or most recent version), to make these thermal conductivity measurements. For high thermal conductivity building components,...