Storage heater allows you to share more then 1 outlet, like basin & shower point, but it is bulky, cost more and waste electricity. Instant electric heater allows only 1 outlet point and is a problem in new flats with conceal piping already laid for mixer taps to more then 1 outlets. I bought an instant multipoint electric water heater by a local manufacturer, 'BENNINGTON" and it actually combines the advantages of normal storage and instant heater and it was working well for the past 3 yrs. Recently bought another piece for my Pinnacle house.