Trying to run a large boiler machine that's designed to overcome a certain value of losses in order to maintain reliable and consistent operation, i.e. 3.6KW will not be able to run satisfactorily at an input that would be nearly half this. Recovery time of the boiler after knocking up a handful of milk coffees will be awful and create delays for other people waiting in line for their orders. Not a good thing in a commercial situation...

Mal.

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