The parasitic power fractions and specific costs are shown in Table . Only statistically significant (p<0.05) regression coefficients are reported. The parasitic power fraction, λ , (Figure ) and specific cost, , (Figure ) are shown for glycol-water closed circuit cooling towers. The condensing tower parasitic power fraction, λ , (Figure ) and specific condensing tower cost, , (Figure ) are shown for an R22 condensing tower. The data are found to vary most substantially with the approach temperature difference. The wet towers have a dependence on the ambient wet bulb temperature (shown in each legend), while the dry towers do not. Only data for a temperature range of 4°C is plotted for cooling towers; however, temperature range data between 2°C and 32°C is used in the regression.