Hi, long time lurker, first time poster...   Now that the Cool Energy heatpumps have electronic expansions valves and VFD driven compressors/fans, do you think they represent a good purchase at the current retail price of £3k for a 'up to' 9kW unit?   Seems like quite a good offering although the warranty terms are the usual junk 'must be installed by an accredited installer' etc etc... The user manuals and installation diagrams aren't hidden behind a paywall/registration por