Parallel Reverse Return Header, Direct Supply Rise
This is a variation of both the direct and reverse return systems, whereby it is not feasible to
have a full reverse return piping.
Instead, only the return header is in reverse, whereas the supply to the individual fan coils are in
direct configuration.
direct supply
reverse
return
This method will have the advantage of lower installation cost with some benefits of a better
water balanced system.
Balancing valves are required for each fan coil unit for proper flow balancing.
Section 2 Page 13
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