Hot boxes Air Air velocities Boundary conditions Convective and radiative heat transfer Convective coefficient Convective heat transfer Environmental boundary conditions Experimental evaluation Experimental test Flow measurement Flowmeters Guarded hot box Heat convection Heat flow meters Heat flux Heat flux meters Heat resistance Heat transfer Hot Box Internal surface thermal resistance Internal surfaces Low temperature gradients Measurements of Nondestructive examination Nondestructive technique Radiative heat transfer Radiative transfer Stratigraphy Temperature differences