Cli-mate Fan controller 4A

A simple temperature-driven controller for a fan box, with two speed settings and an external temperature sensor.

The Cli-Mate Fan Controller 4A drives your extraction on measured temperature. Two dials, two settings, a splash-proof housing and mounting brackets. Rated to 4 amps at 220 to 240 volts, with a temperature range of 0 to 40 °C.

Stepped or stepless: what the difference is in practice

This is the first choice you make when controlling a fan, and it is worth a multiple in price.

A stepped controller like this one switches between a low and a high setting. If it gets too warm the fan goes to high; as it cools it drops back. The transition is a jump, not a gradual movement.

A stepless controller follows the temperature continuously and holds your extraction at exactly the speed needed at that moment.

What that means in a grow room:

• Noise. You hear a jump from low to high. In a house that is the argument that most often decides it.
• Stability. With two settings your temperature swings between the two switching points. Stepless keeps it flatter.
• Price. A stepped controller costs a fraction of a stepless one. For a small tent with a generously sized fan, that is a sensible trade.

Working in a shed or garage where noise does not matter, with a fan comfortably oversized for the space, this controller does exactly what you need.

Technical Specifications:

• Control: 2 steps, automatic on temperature
• Operation: 2 dials
• Sensor: external temperature sensor
• Rating: 4 A
• Temperature range: 0 to 40 °C
• Supply: single phase, 220 to 240 V, 50 Hz
• Housing: splash-proof, with mounting brackets

Frequently asked questions

Will my fan work with this?
Check your fan's rating plate for its current draw in amps. Stay comfortably under 4 A, because a motor briefly draws more than its rated current on startup.

Can I run two fans from it?
Only if their combined draw stays well within 4 A. When in doubt, a heavier controller is the safer choice.

Does it control my intake as well?
It controls whatever you connect, intake or extraction. To control both separately you need two controllers or a twin version.

Will I hear a hum?
With stepped controllers that can happen, depending on your fan. To rule it out, look at a frequency controller.