If you’re building a large home with both heating and cooling loads, you may want to try the ultimate geo system.
Typically the HP runs in heating mode and then transfers over to cooling mode when required. Hopefully you have 2 buffer tanks for this unless you only need a seasonal transfer.
A heat pump inherently produces both hot and cold at the same time. Why not use that and get COPs beyond belief. The challenge is piping it and controlling it.
Here is a sample system:
Note this project used radiant floor cooling which I don’t recommend.
Using 6 way valves every zone can have what it wants.
