Zoned heating question

[stratplus]

When installing a system with zoned heating, could there be a problem with reverse circulation if you had two flows (one for each zone) but had only one return? I've always ran a separate return for each zone but heard others only install the one return for both zones.

 

[Ermintrude]

I can't see it tbh. I always run each rad back to boiler area when I can and Zv each rad.

 

[gasmanrob]

It is possible same principal as teeing the cylinder in as last tee on the return. Only ever seen it once and it only effected one rad