Looking to have a Vaillant aroTHERM PLUS air source heat pump and uniTOWER 7kW installed in a well-insulated barn conversion for UFH and DHW. Can anyone confirm that this set up has everything required, as one quote adds a whole load of other stuff including a buffer tank, which I thought was already included in the uniTOWER. The quote was also around 3x the cost of the system on the Wolseley site with £3500 labour so if anyone knows of any good MCS installers on the Surrey/Hants borders then perhaps let me know.
https://www.wolseley.co.uk/product/vaillant-arotherm-plus-air-source-heat-pump-and-unitower-7kw/
Thanks.