We have a 1930s 3 bed semi at the coast. It’s been repointed and insulated etc and couple of years ago our oil heating was replaced with ASHP to start with we were angry and hated it especially when it slurped through over £200 extra in one month. After the settings were corrected and I turned off the immersion heater that was set to come on every day, thanks installer we got the hang of it and it keeps the house at a constant 19C to save money
We are on Agile and have it shut off between 4 and 7 when electricity is peak and our avg is about 16p/kwh each month.
I’d not go back to anything else, love ASHP now, love the fact radiators don’t get stupid hot, put kittens love the fa t they can use the curtains as bedding and sleep on the radiator without overheating too.
We have a 400 litre tank for hot water and the ASHP on its own heats that to 55C or so.
We also have solar panels now but they went in during December so don’t know how that’ll affect things yet. All thanks to our housing association really, they’re really aggravating in so many ways but they did a decent job on these 2