The Evaporator Fan Controllers are developed for use in walk-in coolers and freezers like the ones found in convenience stores, flower shops, schools, hospitals, cafeterias, etc. The fans in the evaporator boxes run at normal speed at all times, even if the thermostat is not calling for a cooling cycle. To save money, the Evaporator Fan Controllers monitor the temperature on both the intake and exhaust of the evaporator fan unit. When the temperature of the exhaust is lower than that of the intake, the fans will run at normal speed. When the temperature of the exhaust is equal to the intake temperature however, the Evaporator Fan Controllers will reduce the speed of the fans to save energy, reducing energy costs by approximately 62%. When the compressor turns back on to meet thermostat requirements, the Evaporator Fan Controllers will then once again return the fans to normal speed. This temperature monitoring and fan speed control allows for energy savings without an impact on the overall temperature of the cooler or freezer.
Currently there are two models available: The EFC4045T and the EFCECM1T. The EFC4045T is compatible with both ECM and shaded pole motors whereas the EFCECM1T is compatible only with ECM motors.
Example Calculation of Energy Savings
| Compressor Off Cycle: 75% | Compressor Off Time per Year: 6570 hours | Power Consumption @ Low Speed: 0.036 kW |
| Hours per Year: 8760 hours | Typical Cost of Power: $0.10/kWh2 | Power Consumption @ Normal Speed: 0.209 kW |
Measured values for two shaded pole motors in one unit1
Savings =
(Power Consumption @ Normal Speed - Power Consumption @ Low Speed) x (Compressor Off Time per Year) x (Typical Cost of Power) =
(0.209 kW - 0.036 kW) x (6570 hours/year) x ($0.10/kWh) = $113.66/year
1 = Actual measurement from test site.
2 = Average US price of electricity as reported by the US Energy Information Administraton.
Money Savings Calculator
Want to see how much money you could save? Change the values to meet your specific application and see how much the EFC can save you!
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This calculator is just an estimation of savings. It is in no way a guarantee of cost savings, as each application involves variables that cannot be taken into account in this calculator.
