A refrigeration system, comprising: a first circulation fan electrically coupled to a power source via a first load wire; wherein the first circulation fan can operate in a low-speed mode and a high-speed mode; wherein operation of the first circulation fan in the high-speed mode reduces a defrost cycle time associated with the refrigeration system relative to operation of the first circulation fan in low-speed mode, characterised in that the refrigeration system further comprising: a relay electrically coupled to the first circulation fan via a second load wire and to the power source, the relay comprising a lead that is electrically coupled to a controller; in an open position, the relay interrupts electrical voltage from the relay to the first circulation fan via the second load wire such that electrical voltage is provided to the first circulation fan via the first load wire causing the first circulation fan to operate in a low-speed mode; in a closed position, the relay supplies electrical voltage to the first circulation fan via the second load wire such that electrical voltage is provided to the first circulation fan via the first load wire and the second load wire causing the first circulation fan to operate in a high-speed mode; and a second circulation fan electrically coupled to the power source and the relay in parallel with the first circulation fan; and a third circulation fan electrically coupled to the power source and the relay in parallel with the first circulation fan and the second circulation fan. a first circulation fan electrically coupled to a power source via a first load wire; wherein the first circulation fan can operate in a low-speed mode and a high-speed mode; wherein operation of the first circulation fan in the high-speed mode reduces a defrost cycle time associated with the refrigeration system relative to operation of the first circulation fan in low-speed mode, characterised in that the refrigeration system further comprising: a relay electrically coupled to the first circulation fan via a second load wire and to the power source, the relay comprising a lead that is electrically coupled to a controller; in an open position, the relay interrupts electrical voltage from the relay to the first circulation fan via the second load wire such that electrical voltage is provided to the first circulation fan via the first load wire causing the first circulation fan to operate in a low-speed mode; in a closed position, the relay supplies electrical voltage to the first circulation fan via the second load wire such that electrical voltage is provided to the first circulation fan via the first load wire and the second load wire causing the first circulation fan to operate in a high-speed mode; and a second circulation fan electrically coupled to the power source and the relay in parallel with the first circulation fan; and a third circulation fan electrically coupled to the power source and the relay in parallel with the first circulation fan and the second circulation fan. a relay electrically coupled to the first circulation fan via a second load wire and to the power source, the relay comprising a lead that is electrically coupled to a controller; in an open position, the relay interrupts electrical voltage from the relay to the first circulation fan via the second load wire such that electrical voltage is provided to the first circulation fan via the first load wire causing the first circulation fan to operate in a low-speed mode; in a closed position, the relay supplies electrical voltage to the first circulation fan via the second load wire such that electrical voltage is provided to the first circulation fan via the first load wire and the second load wire causing the first circulation fan to operate in a high-speed mode; and a second circulation fan electrically coupled to the power source and the relay in parallel with the first circulation fan; and a third circulation fan electrically coupled to the power source and the relay in parallel with the first circulation fan and the second circulation fan.