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