The largest unit in the range, it is fitted with six 1.5kw elements and is complete with two dial themometers which are fitted through the lid of the steriliser into the soil. Sterilisation time is the same as for the two smaller models with a consumption of 13½ units of electricity . This model should be connected to a 3 phase supply and should be installed by a qualified electrician. The HD5116 Steriliser is particularly suitable for larger nurseries, local authorities, etc.