Building my own radiant (hydronic) system

Thanks!  I had some of those ideas in mind but didn’t commit them to the sketch. I’ll certainly add them. I appreciate your time and ideas.

One further question ( for now); where should the “ closely spaced tee” go if it’s needed?  Thanks.

Tom Moran wrote:One further question ( for now); where should the “ closely spaced tee” go if it’s needed?  Thanks.

I don't think you need closely spaced tees. As I understand it, closely spaced tees or hydraulic separators are used to isolate the primary (heat source) and secondary (load) parts of a system. Your heat exchanger will perform this function. It isolates the pump in the Navian loop from the pump in the floor loops.