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Everett Courts Dedicated Outside Air Efficiency Calculation <br />Efficency of heat recovery unit= (Ts-To)/(Tr-To) <br />where <br />Ts= Temperature of supply air leaving the heat recovery unit (in deg F) <br />To= Temperature of outside air entering the heat recovery unit (in deg F) <br />Tr= Temperature of return air entering the heat recovery unit (in deg F) <br />Unit <br />Ts <br />(Deg F) <br />To <br />(Deg F) <br />Tr <br />(Deg F) <br />Efficiency <br />DOAS-1 <br />59.7 <br />1 23 <br />70 <br />0.78 <br />DOAS-2 <br />50.9 <br />23 <br />68 <br />0.62 <br />Notes <br />1 DOAS-2 is not provided with supplemental gas heal <br />2 Efficiency required for DOAS-1 and DOAS-2 is 50% minimum per WSEC Section 1433-Exception 10. <br />