An HVAC refrigeration circuit comprising: at least one condenser coil comprising a plurality of tubes configured to circulate refrigerant, and comprising one or more stages coupled to one or more compressors , wherein the at least one condenser coil is fluidly coupled to other components of the HVAC circuit; at least one temperature sensor ; at least one fan configured to provide airflow across the plurality of tubes ; and a controller configured to control the speed of the at least one fan and to receive temperature measurements from the at least one temperature sensor , the controller further configured to associate a measured temperature with a predetermined fan speed and to direct the at least one fan to spin at a rate greater than or equal to the predetermined fan speed when the measured temperature is less than a predetermined temperature and to maintain the speed of the at least one fan at greater than zero rpm at all times during operation of the HVAC refrigeration circuit , wherein the condenser coil comprises first, second and third stages , wherein each stage is coupled to a respective compressor , the circuit further comprising at least one pressure sensor coupled to a liquid line of the condenser coil , the controller configured to receive pressure measurements from the at least one pressure sensor , and to control the activity of the first, second, and third stages and the respective compressors , the controller further configured, when a measured temperature is below a predetermined temperature, to associate the measured temperature with a fan speed to maintain pressure in the liquid line within a predetermined range, and the controller configured to adjust the at least one fan to the fan speed. at least one condenser coil comprising a plurality of tubes configured to circulate refrigerant, and comprising one or more stages coupled to one or more compressors , wherein the at least one condenser coil is fluidly coupled to other components of the HVAC circuit; at least one temperature sensor ; at least one fan configured to provide airflow across the plurality of tubes ; and a controller configured to control the speed of the at least one fan and to receive temperature measurements from the at least one temperature sensor , the controller further configured to associate a measured temperature with a predetermined fan speed and to direct the at least one fan to spin at a rate greater than or equal to the predetermined fan speed when the measured temperature is less than a predetermined temperature and to maintain the speed of the at least one fan at greater than zero rpm at all times during operation of the HVAC refrigeration circuit , wherein the condenser coil comprises first, second and third stages , wherein each stage is coupled to a respective compressor , the circuit further comprising at least one pressure sensor coupled to a liquid line of the condenser coil , the controller configured to receive pressure measurements from the at least one pressure sensor , and to control the activity of the first, second, and third stages and the respective compressors , the controller further configured, when a measured temperature is below a predetermined temperature, to associate the measured temperature with a fan speed to maintain pressure in the liquid line within a predetermined range, and the controller configured to adjust the at least one fan to the fan speed. <EOS>