Would love information on what you did for the heated floors. Mine suck and seems like I need to do something similar to what you did. Did you replace an existing system, or put new? If new, how did you get the loops out to the concrete from the ER?
We replaced all the lines from the ER and the two manifolds on the boiler. The new manifolds came with individual controls for each line (one per bay) so we can regulate the flow/temp based on distance to the ER. The 30 year old 500K BTU boiler still runs and can heat an apartment house according to the plumber. Only 80% efficient but saving $10K for a new boiler. Getting the lines through the wall was easy for the plumber.
Process took 3-4 full days.
Day1: Demo floors in 5 bays and start boxes for new floors
Day2: Rebar (we upgraded to a stronger than average rebar so trucks are not an issue) and slightly stronger rated concrete
Day3: plumber lays all the lines, 10"-12" apart in each bay tied to the rebar. All the lines feeding each bay go thru the new apron area that is also heated. Plumber added a pressure gauge to the lines and pressured the lines to make certain the concrete guys did not mess them up or puncture them (which seems to happen if concrete guys do not pay attention to details).
Day 3a: We took advantage of the open floors to add PVC pipes to capture the weep water from brush and wand. In hindsight I might have added a spare unused PVC for the future and a line in the exit area apron as the material is the cheapest part of the work.
Day4: The concrete pour and grading the bay floor slope toward the pits - big difference as you can see the water run to the pit.
Day5: Plumber mixes the glycol/water mix and adds to the system. He used the anti-corrosion glycol version.
First winter all the bays became ice skating rinks that had to be closed at times for safety. This winter we never had any ice in the bays or leading up to them. Customers have noticed all the changes and improvements reflected in feedback, comments to me directly, and business. Get a good commercial plumber to do the work, a residential plumber may not be as experienced with this work. Not rocket science but reassuring to have a plumber who knew what to do and help the concrete guys not take shortcuts.