Joining this thread I cannot offer any hints or tips for running heat pumps, or gas heating appliances, as we don’t have any advanced tech like that.

This is our fourth house since getting married, since the 70’s the previous three new  houses were conventional UK mains gas, wet systems, radiators, hot water etc.

We had problems with every UK house that had a wet gas fired heating system, bad installation, leaks, electrical problems etc.

So decided we would not seek to emulate our previous UK heating “advantages” when we moved to France.

Here we use a mixture of kerosene, wood and electricity to heat our house and provide hot water in north west france.

The kerosene we buy anywhere, diy stores,supermarkets, if it’s a good price, to use in heaters that are not generally known about in the UK – 100 % efficient, bur very popular in Japan.

https://www.qlima.com/heating/liquid-fuel-heaters.html

The wood we use,is some of our our own from fallen dead trees in our own woodland, mixed with bought in wood from commercial suppliers and is keeping us warm right now.

For the bathroom. shower room,bathroom and bedrooms we use electrical inertia heaters if necessary to top up the heat.

If the electricity fails, we have a generator so the kerosene heaters will still work.

That’s how we live where we are now.