Preferably, the housing 22 is sized sufficiently large to provide {HEAD ~ intermediate demand capacity} for {TAIL ~ the system} equal to the hot water heater capacity 
for
Preferably , the housing 22 is sized sufficiently large to provide { HEAD ~ intermediate demand capacity } for { TAIL ~ the system } equal to the hot water heater capacity
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH