Known systems for recovering heat from refrigeration plant make no distinction between the different kinds of heat being recovered and use {HEAD ~ both low and high grade heat} together to raise {TAIL ~ the temperature} of say a water tank 
together to raise
Known systems for recovering heat from refrigeration plant make no distinction between the different kinds of heat being recovered and use { HEAD ~ both low and high grade heat } together to raise { TAIL ~ the temperature } of say a water tank
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH