I'm a water cooler sales perseon. The blue tap should produce cold water approx 6 - 10 degrees the white tap should prodcue room temp (remember if you office get cold at night that will affect it. on the coolers i sell they have a blue tap and a white tap but thay are both connected to the single tank (cold water only). The only cooler i have ever sold with 2 tanks is a FSHC (free standing hot and cold). It has a cold tank and a hot tank. on a hot and cold cooler you can turn off the hot tank which will then produce room temp water. (thus you can swap the red tap to a white tap.