On Tue, 14 Aug 2018 13:37:11 +0100, John Rumm wrote:

A heater that holds less total energy, but allows its delivery in a more
targeted way may well achieve the desired heating profile equally well.

Agreed, at the end of the E7 period an old style storeage heater is
damn hot, almost dangerously hot and the room far too warm. Better
control of when the stored energy is released is going to reduce the
total amount consumed. "Better control" meaning higher levels of
insulation and time of day related temperature set points.

--
Cheers
Dave.