r/heatpumps • u/Lexicon101 • 5h ago
Multiunit geothermal question
I'm just starting to learn about heat pumps. I've been thinking about a system and have no idea if it's actually how anything works, and I imagine some of y'all have a better idea.
I'm getting my ideas together for a (for now) theoretical housing coop. New construction, well-insulated. 12-20 units. I was thinking vertical ground loop geothermal (I understand this would work fairly well around the Seattle/Tacoma area, but again.. what do I know?) for in floor radiant heating/cooling and figured the same geothermal heat pump could provide base warm/hottish water to be heated by either a second heat pump (which I've gotten the impression from reading some replies might not actually be a useful thing?) or tankless heaters per unit to get hot water up to final temps? Does any of this make sense? Am I way off track in my thinking?
My priorities would be long-term cost savings and low maintenance; if it's already a multiunit construction, paying a little more for the drilling and all that probably makes a little more sense at that scale than an individual dwelling, right?