Cooling Tower Nominal Tons Description

Evapco, McQuay, Marley, and BAC Cooling Towers Nominal Tons

Product capacities are called out in terms of nominal tons. A nominal cooling tower ton is defined as the capability to cool 3 GPM (0.19 lbs) of water from a 95ºF (35.0ºC) entering water temperature to an 85ºF (29.4ºC) leaving water temperature at a 78ºF (25.6ºC) entering wet-bulb temperature. Nominal conditions are typical of conventional HVAC designs in most parts of the country, but will not apply to all projects.

Average Monthly Wet Bulbs TemperaturesWestern Regional Climate Center