The E/2 HeatX 24V is heated by heating cable. The heating cable protects not only the water in the bowl even the valve is warmed up and frost protected and this is where similar drinkers have it‘s greatest weakness. Two versions are avai- lable. The E/2 HeatX 24V with and without thermostat cont- rol. With the thermostat version there are additionaly apprx. 3m heating cable to protect the connection pipe from frost. Regulating range of the thermostat: below 5°C on, above 15°C off. The version without thermostat heats up when vol- tage is applied. Both models need a transformer.