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