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Where:

 

 GPMcw                = Water flowrate in chilled water coil, GPM
 GPMhw                = Water flowrate in the hot water coil, GPM
 qs                = Total system sensible and latent gain, Btuh
 qh                = Total system sensible loss, Btuh
 TDcc                = Temperature rise in chilled water coil, F
 TDhc                = Temperature drop in hot water coil, F
 SHw                = Specific heat of water, 1 Btu/lb-F
 60                = A constant, 60 minutes/hour
 8.33                = A constant, lb/gallon (water)