New Closed System Summary

First of all I would like to thank NJ Trooper and HO Heating for helping me with wiring my new boiler. It seems to be working flawless. Since I'm a novice to hydronics I thought I would give everyone and overview of my first system and see if some of you might have any inputs to help me make it work efficiently. I'm heating a 1150 square foot, 3 stall garage and a 200 square foot breezeway on 2 separate zones. Each zone has it's own circulator. I'm using an HTP MC-50 boiler piped with 1" copper feeding a 1" Caleffi 4 loop manifold. Each loop is a little over 250 feet of 1/2 pex tubing. My breezeway loop I have branching from the main 1" line to another circulator where I have it reduced to 3/4" and then have it reduced down to 1/2' pex. I do not have a flow meter on this line. My intentions were to install a clamp on temperature gauge to my incoming and outgoing lines and vary my flow with my isolation valve on my circulator if necessary. This loop is extremely short compared to the garage loops. Less than 100 feet. My location is north central Iowa. Garage floor is a 5" concrete slab with 2" foam inside footings to within a 1/2" of the top of the floor and 2" under slab with a moisture barrier. R-19 walls and 19" of blow insulation in the ceiling.