Detached property, hosted by Jane

We have a 4 bed detached property in a close. Over ten years, we changed the doors and windows, added an extension, added solar and a battery, then a car charger. Our latest addition has been to add an air source heat pump using the government grant of £7,500. Our section of the bill was under £4,000.
Our installation was exciting, we had 4 or 5 Octopus lads in the house and several electric vans outside for a week.  On day 3 we also had a pair of workers taking out asbestos from the airing cupboard.  We were given a new EPC as part of the deal.  It was bitterly cold, the Octopus workers were with us from 8 am to 5.45 pm and worked in a jolly but very focussed manner. They briefed us on what they were going to do and what they got done each day. By Thursday lunchtime the heat pump was working and they set it up and monitored it over night and until Friday afternoon when they left. We were given fan heaters to use during the installation which we got to keep at the end. They worked around us regards switching off internet and electricity and we were able to work from home throughout. They left it cleaner than when they arrived.

We expected it to be a bit difficult to get warm and different to gas as it doesn't like shooting up and down quickly. The actual heat pump unit is bigger than expected. The empty cupboard where the gas boiler was is a plus, the lack of an airing cupboard means a bit of change of routine.
We have it set for 16 degrees at night and 20 degrees from 7 am to 11 pm.  We leave it like this except for warm sunny days when we can turn it down with the app from anywhere. We don't notice more noise than a gas boiler. The air in the whole house is warm and comfortable and as it is the same everywhere it actually feels warmer. We have had it a month and saved £40 on our bill. We had gas cut off so no gas bill or standing charge anymore. We are also running a car off the electric which saves a further 60 or 70 pounds a month. Once we have a full year of bills we will be able to really assess the financial differences.