![]() ![]() These conditions are easily plotted on a psychrometric chart. HVAC Sheet Metal Courses Online Psychrometric Chart We measure that the same 2,000 CFM entering the coil is also leaving the cooling coil, but at a reduced temperature of 56 DB and 53 WB. The next step is to measure the leaving air conditions. Entering Conditionsįor our example we will assume that the field measurements determined that there is 2,000 CFM of air passing over the cooling coil at 76 DB (Dry Bulb) and 64WB (Wet Bulb). What we need to do to come up with the values for our calculation, is to take some field measurements to come up with the CFM and the temperature of the entering and leaving conditions. Lt(h) = Leaving Total Heat (BTU/LB of Dry Air) Et(h) = Entering Total Heat (BTU/LB of Dry Air) ![]()
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