Can hydraulically isolated loops be nested in a hydronic system?

I'm trying to solve a design problem.  My house used to have two boilers, the house was expanded after it was originally built and another boiler was added for the addition.  I'm replacing them with one boiler.  I have near boiler piping with primary and secondary loops as usual for a modulating condensing boiler, and I need to run piping from the secondary loop 40 feet away to the other side of the house, where I want to branch off into three hot baseboard zones, and one radiant zone.  Normally a system design would just run long pipes for each zone to that end of the house (a total of 8 pipes counting supply/return).  Seems like alot of heat loss and head loss to me........

I'm thinking of running a 1" supply/return pipe from two closely located Ts on the near boiler secondary loop and then running to the far end of the house.  I would have to have another circ pump on this 1" loop near the supply T.    This 1" pipe would be a long loop hydraulically isolated from the secondary loop (thus a teriary loop?).  Then on the far side of the house, I would come off that 1" loop with two pairs of closely located Ts, one pair for the hot baseboard zones, and the other for the radiant zone with a mixer.  Each of these nested loops would be hydraulically isolated and would need their own circ pump. 

This seems like an awfully complicated way to avoid running more piping to the other end of the house doesn't it?  Seems like I would have alot of extra electrical use due to the extra circ pumps, plus the cost of the pumps.      Any suggestions?

Taco LoadMatch?

Taco LoadMatch, interesting...   I hadn't heard of that before, but after reading about it, this is basically what I'm talking about doing if you just look at the single 1" loop going to the far end of the house.  Taco Load Match is a series of decoupled loops along a large pipe sized for the entire building, not sure if they nest the loops or not. Taco LoadMatch seems to be for commerical jobs, not sure how they get around the problem of multiple zones being pulled off in series as the temp drops the further down you go.  I guess they probably just run a really high temp through the line and have mixers for each decoupled loop, but I didn't read that much about it.

But what I was going to do would avoid the in series problem of dropping temperatures further down the large pipe.  The 3 baseboard zones on the far side of the house would be on a decoupled loop with a circ pump feeding 3 supplies coming off for each zone first (each with zone valve), and then the 3 returns coming back into the loop.  and another decoupled loop would come off next for the radiant, where the mixed supply/return temp won't matter, through a circ pump and to the manifolds, then return.  Is seems like a good design, just very inefficient.

The way I believe they do it is by controlling the flow in each loop. With heat supply being a function of temp and volume you can use one or the other or both to control the system. Gives you the opportunity of tuning the system. I like the simplicity, it is probably overkill for a small system.