HOT WATER SUPPLY SYSTEM
HOT WATER SUPPLY SYSTEM
(OP)
IF WE HAVE 2 HOT WATER SUPPLY (HWS) NETWORKS WITH DIFFERENT TEMPERATURES 60& 80 DEGREE CELSIUS
CAN WE MAKE ONE COMMON HOT WATER RETURN LINE COMBINED FOR THEM BOTH ?
2- REGARDING THE HOT WATER RETURN... IF WE HAVE ONE HWS MAIN LINE WITH MANY BRANCHES TO PLUMBING FIXTURES
IN THIS CASE, IF WE USE DIRECT RETURN WE HAVE TO TAKE RETURN FROM ALL HWS BRANCHES WITH BALANCE VALVE NEAR THE END OR
OT TAKE THE RETURN FROM THE END OF THE HWS MAIN LINE ONLY ?
CAN WE MAKE ONE COMMON HOT WATER RETURN LINE COMBINED FOR THEM BOTH ?
2- REGARDING THE HOT WATER RETURN... IF WE HAVE ONE HWS MAIN LINE WITH MANY BRANCHES TO PLUMBING FIXTURES
IN THIS CASE, IF WE USE DIRECT RETURN WE HAVE TO TAKE RETURN FROM ALL HWS BRANCHES WITH BALANCE VALVE NEAR THE END OR
OT TAKE THE RETURN FROM THE END OF THE HWS MAIN LINE ONLY ?





RE: HOT WATER SUPPLY SYSTEM
2. It depends on how long your branches are. If they are less than the code maximum length for unrecirculated hot water (50 ft in the current IPC), then you would not have to provide a separate balancing valve. If the branch does exceed the length, you have to provide the balancing valve.
RE: HOT WATER SUPPLY SYSTEM
2. What Peddarin said. One caveat, last I checked the less used Universal Plumbing Code (UPC) requires circulated hot water to within 25 feet. Check your current governing code.
RE: HOT WATER SUPPLY SYSTEM
Depending on the size of the system (and the building), running the pump continuously is not going to be a big energy drain. These pumps are typically use energy measure in watts, not horsepower.
Again, I would not recommend a combined system - too many things to go wrong and you get the blame.