Do I need a 3-phase electrical supply?

It depends on the system size, type of heaters selected (for example our Vulcan heaters require a 3-phase supply) and the overall number of heaters. 

For small to medium size installations and spot/zone heating of smaller areas, often a single-phase is sufficient. 

However, for larger commercial spaces with high heating demand and where other electrical appliances/machinery is being used: 3-phase may be recommended to spread the electrical load more efficiently across the phases.  Please consult your electrician who will be able to advise.