Fan Speed Controller: iPower Exhaust Fan Speed Controller Adjuster for Duct Inline Fan Vent Blower 350W

Buscaba reducir la velocidad de rotación de un molino de cafe de 200W, hace justamente eso. Si llega a fallar prematuro actualizaré la reseña, hasta ahora todo perfecto.

Works great on our variable speed exhaust fan.

Perfect for optimizing the speed of your fan. I almost didn’t get this due to many reviews saying “it does nothing at all”. This inexpensive control merely throttles the current to your fan, enabling you to reduce the speed by up to 50%. It works exactly as described and is an excellent control for reducing the speed and/or noise level of your fan. UPDATE: The controller failed after a couple weeks. iPower sent a brand new replacement, and I received it within a couple days. This is the third product I’ve tried from this company, and I have been very happy with performance and support. They definitely stand behind their products.

Used this to dampen/lower CFM of 375cfm Radon mitigation system duct fan mounted outside home. 375cfm was too high and causing air to be pulled from within the home cavity(interior, windows, attic) into the crawlspace. This wasted far more energy than would’ve been needed(electric for A/C in Summer, propane for Furnaces in Winter). While some duct fans have a potentiometer within, to do the same job as this device, my unit did not. Reportedly it is vital that the fan motor not be lowered below 50% energy supply. 2 Year Update: survived many weather events throughout four seasons per year and running 24x7x365.

This item works perfectly to give me better control over a 20 inch orbital drum fan that already had 3 speeds but there was very little difference between high and low speeds. From what I read online I didn't think this would even work. But eventually I decided to take a chance and try it out. I am so happy that I did. It could not work better. The item has a very good quality feel. The dial to adjust speed it smooth and feels like it will last a very long time. Highly recommend. Even if what you want to control already has speed control this still gives you more control. Excellent product.