The heat system in my house needs replaced. Currently it's 2 separate hydronic ducted systems, one upstairs and one down. Totally separate except for the hot water heater source. The upstairs unit crapped the bed and I would like to replace the whole thing with a heat pump heat/AC system, hopefully using the existing ducting. Does anybody have detailed knowledge to answer questions? Online all I can really find is general crap about whether heat pumps are for you, etc.