We'll be soon having our 1931 house renovated and extended. This renovation will include EWI, underfloor heating, solar panels and heat pump. The idea will be to bring the BER up to an A-rating. We currently have a gas-powered combi boiler; so we get our hot water on demand. With this we've got a pump that engages any time a hot water tap is turned on.
With the addition of the heat pump I'm assuming we'll get rid of the combi boiler. I don't know what our best options are for hot water. I really like the on-demand nature of the combi-boiler, although I'm not a fan of the loud pump. In terms of our usage patterns, I have a 5 min shower in the morning and my partner has a significantly longer shower - this could be 20 mins. We then use the on-demand water for washing dishes. We'd also use the hot water for hand-washing but it takes too long that we just use cold water.
So in summary, when i've got a heat pump, what options are available for hot water supply to sinks/showers?