The Samsung 8kW EHS Mono HT 3ph Heat Pump is a reliable and efficient single fan monobloc, using R32 as the refrigerant. It is super quiet and capable of 70°C flow temperatures. Samsung heat pumps have a great track record of solid performance in the UK and a 7 year warranty if you complete their EHS installer training.
The unit is awash with new innovations including flash injection for high temperature and output, numerous noise reduction features and full output down to low outside air temperatures. You can install these with a pre-plumbed cylinder or buy a MIME03EN control kit for use with a standard cylinder. However, these are a standalone heat pump so all additional and necessary components will need to be purchased in addition to the outdoor unit.