"Dave. ;-)

Don't some store a small amount of hot water to get over the initial wait
from those without?




My Worcester Heatslave floor standing one had this feature - the problem was
though that the stored water was hotter than what the boiler could produce
for a shower which meant that the shower started off really hot using the
stored water and then got a bit cooler. However - never a big problem - more
one of it being too hot to start with.