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Topic: Fan-Tastic Vent Reduce Fan Speed (Read 388 times) previous topic - next topic

Fan-Tastic Vent Reduce Fan Speed

Even on the lowest setting there are times when the fan pulls more air and is noisier than I'd like. Anyone know of a way to lower the speed?

see ya
ken
The selected media item is not currently available.ken & dori hathaway & Big Agnes
🍺1992 U300 GrandVilla WTBI #4150 FOT FBP 2011
✨6V-92TA DDEC Parlor Coach 350HP Series 92
🏁2011 Nissan XTerra Pro-4X

Re: Fan-Tastic Vent Reduce Fan Speed

Reply #1 –
Hi Ken - What about a rheostat?
Scott & Carol Seibert
2001 42' double slide U320 - Sold
Previous - 2002 36' U320

Re: Fan-Tastic Vent Reduce Fan Speed

Reply #2 –
It's just a DC motor. Adding a series resistor will drop a few volts for you. Make sure it is rated for enough power to handle the voltage drop and current.

If you measure the voltage and current at the motor, I will be happy to aid in the resistor selection. A rheostat instead of fixed value resistor might be best so you can fine tune it.

The manufacturer probably set the minimum voltage a bit high to make sure it starts and continues to run at the lowest setting.
Tom Lang K6PG (originally  KC6UEC)
and Diane Lang
2003 38 U295 build 6209
2016 Jeep Grand Cherokee Summit Ecodiesel
still have tow-ready 2006 Acura MDX 
Temple City, California
Motorcade 16681 California Chapter President
SKP 16663 member of SKP Park of the Sierra, Coarsegold California
FMCA F071251
Retired electrical and electronic engineer

Re: Fan-Tastic Vent Reduce Fan Speed

Reply #3 –

You can use a PWM dc motor speed control.  A pulse width modulation controller creates very little heat and uses less current to run the motor at slower speeds.  Similar to this one at Amazon for $13.

KEEDOX? NEW 6V-90V 15A DC Motor Pump Speed Controller: Amazon.com: Industrial &

It is a 15 amp controller. A lower amp one would probably work for this fan.  You can find then for under $10.

Roger

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Roger Engdahl and Susan Green
2001 U320 3610 #5879 (Home2) - 2014 Jeep Cherokee or 2018 F150
Hastings, MN