I can't see the system performance graphs for the AC units but I'll have a proper look over lunch. It would really boil down to their efficiency at heating...
My immediate gut reaction would be that if you've got UFH in already then yes it would be worthwhile to swap to a HP for that and the DHW, it'll be a more pleasant heat than using the AC all the time which would make the place quite dry.
You're probably right. Certainly the dry air would be a problem.
Main reason I want a HP is the boiler sounds like a jet engine and can be heard across the ground floor whenever it's on. Thankfully, it's only on for just over an hour a day really for HW and a little bit of underfloor heating.
I can't see the system performance graphs for the AC units but I'll have a proper look over lunch. It would really boil down to their efficiency at heating...
My immediate gut reaction would be that if you've got UFH in already then yes it would be worthwhile to swap to a HP for that and the DHW, it'll be a more pleasant heat than using the AC all the time which would make the place quite dry.