A new heating and hot water system being installed into an old house. Navien 150 and Amtrol Hydromax indirect DHW. 4 Zones, 3 with cast iron radiators and 1 zone with baseboard heating.
I asked installer prior to work if he was installing a primary and secondary loop and he said yes but things seem a little different than I thought they would be.
Looking for advice on a couple of things in the photos to fall in 3 groups:
1) It's fine!
2) Not the best but not to worry, it will get you through the winter...
3) Change before he blows up the world!
Oh, yeah. We are waiting for this to finish before we move in. Hopefully before Thanksgiving
Does the piping qualify as a primary loop?
Is it necessary to have a circulator on the primary?
Should I ask for a filter on the return to the Navien?
Is the spacing between the 2 pairs of taco's okay?
Anything else that looks necessary?
Thanks for your time.