Instantaneous and time averaged flame temperatures (T) over bar surface emissive power (SEP) over bar and time averaged irradiances (E) over bar of di-tert-butyl peroxide (DTBP) pool fires with d = 1.12 and 3.4 m are investigated experimentally and by CFD simulation. Predicted centerline temperature profiles for d = 1.12 m are in good agreement with the experimental emission temperature profiles for x/d > 0.9. For d = 3.4 m the CFD predicted maximum centerline temperature at x/d = 1.4 is 1440 K whereas the emission temperature experimentally determined from thermograms at x/d approximate to 1.3 is 1560 K. The predicted surface emissive power for d = 1.12 m is 115 kW/m(2) in comparison to the measured surface emissive power of 130 kW/m(2) whereas for d = 3.4 m these values are 180 and 250 kW/ml. The predicted distance dependent irradiances agree well with the measured irradiances. (C) 2008 Elsevier B.V. All rights reserved.