Quite frankly, I can't see the point of a heat pump at all in this scenario - woodburner, back boiler for hot water along with solar dhw and an immersion heater for backup would make far more sense......
In a word - "no" - it'll be expensive to install and run, and I certainly wouldn't want the blessed thing whizzing and clanking away indoors at all (let alone in a bedroom) - sadly these things are sold as "the answer to all your problems", when they very seldom are!
I always try to put myself in the shoes of the person doing the project, and ask "what would I do?" - when it comes to an ASHP in this sort of property, not in a month of sundays!
Sean,
Martin is a dyed-in-the-wool heat pump sceptic (not without good cause in many cases) but he has never installed or lived with an Ecocent. I have.
In terms of:
- capital expenditure and ease of installation an Ecocent is much cheaper and easier to install than solar DHW and woodburner+boiler central heating.
- energy costs an Ecocent is no more expensive than oil or lpg (probably cheaper).
- operation and maintenance time an Ecocent is easier and cheaper than oil, lpg, solar, and solid fuel.
- noise an Ecocent is similar to an oil or lpg boiler + MHRV.
I took a chance on the Ecocent because it combined capturing solar energy for DWH & UFH with a form of MHRV for the same price as installing a Megaflo DHW system.
The gamble has paid off handsomely for me.
Your case is different to mine - both size and usage patterns - but I think an Ecocent will work for you.
(Advice from qeipl can be bad as well as good. Other ASHP DHW cylinders are available).