Primair Fan Speed Controller

The Primair advanced fan speed controller is one of the best fan speed controllers in its price bracket.

It’s unbelievably simple to use, just set the required air temperature and minimum fan idle speed, and the Primair will keep a constant temperature in your growroom day and night. It’s hard to express just how important this is in producing high yielding plants, proper growroom temperature control and air movement has been proven to be at least as effective as CO2 enrichment in achieving the maximum potential of most plants.

Great product, if you’re serious about growing then you should be using this type of fan speed controller as standard.  Users should be aware that as with any fan speed controller incorporating variable resistors this unit does cause the fan to produce an electrical 'hum' when the speed is reduced.