I'm installing additional growing space at an established 10 room grow. Most of these rooms have CO2 injection. I figured I'd be tee-ing into the line nearest the new rooms, but I came to discover that the rooms are arranged in a loop.
Explanation: Tank --> Regulator --> Valve --> splits at a tee, and two lines go around the building to other rooms, and meeting at a halfway point.
I'm mostly asking for a sanity check here. My experience with compressed air or CO2 has never led me to construct a loop, I wouldn't want to add unnecessary line length that the compressor would be accommodating (extra volume). With CO2 however, coming from a tank with a much higher pressure, I don't see any real downsides, however I'd like to save on hose, fittings, and complication.
The closest I've been able to get to a reason this is needed is this: High flow rates of CO2 can cause lines to ice up, so by doubling the lines you could halve the icing? I don't have an icing problem anyway, we have a decent evaporator outside with fairly well sealed rooms inside.

Can anyone offer any insight?