Hi all this is my first post, i have recently moved into a property and due to the very low EPG rating (G which is the lowest rating) i may be able to get help regarding having an air source heat pump system installed using local funding
my question is this:
so for example with a gas combi boiler, or eg. an electric shower, when you need hot water you get it instantly, as the combi boiler or an electric shower just heats up the water fast when you need it, without needing a large amount of water always heated at the ready
but with air source heat pumps how do they work, as in, like above do they provide hot water fast only when you want/need it, eg. for doing the washing up, or doesnt it work that way, and if not, does that mean they are always on/active working away, and if so, is that not expensive regarding when the bills come in? many thanks