My parents have had a sanyo CO2 eco system installed.

I was very doubtfull of its effectivness however so far (hot water only) it has been superb)

i am in the process of buying a house that does not have a mains gas supply and currenly has an LPG combi boiler.

As lpg is more expensive im seriously thinking about chnaging the boiler etc.

Im concerned of the noise of the outside of the unit and wondered if an air unit would be best. There is a well at the house and plenty of area for a ground pipe system.

As i know very little of the technical side of these systems im looking for some suggestions of what to look at.
Also im told a co2 system is better than a system based on CFC's as it runns hotter and does not need the heaters to purge the system etc.

Thanks for any input.
James