I have a Honeywell whole house humidifier model HE240. Its installed on the warm air supply. I thought this would put the humid air into the warm air stream. Instead its blowing air to the cold air return. The cold air return also has a very high suction so it must be sucking air out of the Humidifier via the bypass tube I am thinking the air would just circulate around from the cold air return to the humidifier and back to the cold air return. Is this correct way for it to operate?