Inexpensive bath fan upgrade.
I had been looking to improve the efficiency of the bath fan. I was looking at a full replacement unit when I spotted this at CW. The unit I spotted was the Vortex unit that leaves the existing vent b...
Forum Discussion
What PWM controller did you use? When I tried this, there was an objectionable high-pitched squeal from the Vortex fan at any speed other than "high." Plus, I measured the current and found that the PWM controller drew several milliamps even when the fan was off, causing unwanted battery drain.
Overall, too many negatives with the PWM controller, so I installed the 3-speed Vortex fan. I made a few improvements to that design, and I wrote about it here: http://www.rv.net/forum/index.cfm/fuseaction/thread/tid/27844279/srt/pa/pging/1/page/1.cfm
Overall, too many negatives with the PWM controller, so I installed the 3-speed Vortex fan. I made a few improvements to that design, and I wrote about it here: http://www.rv.net/forum/index.cfm/fuseaction/thread/tid/27844279/srt/pa/pging/1/page/1.cfm
