My house is a bit of a mish-mash. The front was built in the 1600’s and the back is late Victorian, so the front is built of stone and the back from brick. As such, I was only able to have cavity wall insulation in the brick walls. I found that to be a game changer. The cavity wall insulation was done in February 2020. I had the internal ceiling in the bedroom insulated with TLX Gold Multi-foil insulation, which made it warmer in the winter and cooler in the summer..

I had the air Source heat Pump  installed in June 2020. I am very happy with the ASHP. It heats the water to a nice hot temperature and I don’t even have it turned up to the maximum temperature on the control unit. I would advise people that the radiators do not get as warm as they would with an oil or gas fired boiler, but now that the cottage is better insulated, it is a comfortable 16 to 18 degrees. It could get warmer if I ran the heat pump longer. I only have it running 4 hours in each  24 hour day in winter. I found that I was using 3-4 KWh to run the heat pump even on cold days in the winter and it is a 16 kw ASHP. I do not find it noisy at all.