DesignTools software fromMcQuay(Minneapolis) including DuctSizer, an electronic duct calculator for sizing duct and calculating pressure drops; PipeSizer, an electronic pipe calculator for sizing piping and calculating pressure drops; and Psychrometric Analyzer, which provides state point and system psychrometric analysis for AHUs including cooling and heating coil loads, humidifier loads, and mixed air conditions - is available for download to personal computers from www.mcquay.com.