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by nsteel 897 days ago
The bulk of the cost in the UK seems to be the actual unit. I don't understand why, other than boiler manufacturers trying to maintain the status quo (oversized boilers that can be badly installed by one of the many gas-safe "engineers" already out there).

The split of cavity to solid walls is pretty even in the UK. There are gov grants available for insulation, both for walls and loft. It is true that many houses have moved to a combi-boiler and lost their hot water cylinder but cylinders are smaller than they used to be and personally I would guess the number of converted lofts in these cases is relatively small.

https://www.checkatrade.com/blog/cost-guides/air-source-heat...

https://www.gov.uk/apply-great-british-insulation-scheme

The main problem with an ASHP for your typical 2-3 bedroom terrace house is there is very limited outside space to put the thing.