It might though; lots of boilers are combi systems that do your hydronics as well as on demand hot water. For example another air-to-water system that competes

It might though; lots of boilers are combi systems that do your hydronics as well as on demand hot water. For example another air-to-water system that competes directly with the one in TFA: https://www.viessmann.co.uk/en/products/heat-pump/vitocal-range.html https://www.viessmann.co.uk/en/products/heat-pump/vitocal-ra...