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South Bend MPAC <br />Replace AHU 1 DX RTU with chilled water RTU <br />Energy Recovery Wheel <br />Inputs Existing Proposed <br />A Winter Inside Temperature, °F =70.0 °F 70 °F <br />B Exhaust Air Temperature, °F =75.0 °F 75 °F <br />C Heat Recovery System Efficiency, Heating, % =0% 60%  <br />D Summer Inside Temperature, =72.0 °F 75 °F <br />E Exhaust Air Temperature, °F =74.0 °F 77 °F <br />F Heat Recovery System Efficiency, % =0% 60%  <br />J Heating Energy 8,837 Therms 5,850 Therms <br />K Cooling Energy 117,194 kWh 225,555 kWh <br />N Fan Energy kW 0.00 kWh 0.14 kWh <br />Savings Analysis <br />U Heating Natural Gas Saving : <br /> = Heating Energy Needed * Recovery Efficiency 0 Therm 3,510 Therm <br />V Cooling Electrical Saving: <br /> = Cooling Energy Needed * Recovery Efficiency 0 kWh 135,333 kWh <br />W ERV Fan Motor Operation Energy Usage: <br /> = Fan kW * Total Run Hours 0 kWh 1,207 kWh <br />(ERV runs 350/22; energy saving penalty) <br />Total Electrical Saving 0 kWh 134,126 kWh <br />Total Natural Gas Saving 0 Therm 3,510 Therm <br />Total Electric Usage 117,194 91,429 <br />Winter Heating <br /> Summer Cooling <br />Operation