Topic: Ultra inexpensive DFARS system guts...

[SLOweather]

I saw one of these at a church picnic yesterday. Google solar fan hat.



5-20 bucks or so. A solar cell or 2, and a perfectly matched small DC motor and fan. Buy one and gut it out for a cheapo DFARS. At that price, if it lasts only a year it's still a bargain.

Another option is a solar powered RV plumbing vent for $35 fro Camping World:



or one of those solar vents for a car.

I think I'd go for gutting the solar plumbing vent unit.
 

[DaculaWeather]

I'm stuck with my Vue until it dies, with no way to add a FARS, at least that I know of.

[SLOweather]

I'm stuck with my Vue until it dies, with no way to add a FARS, at least that I know of.

Can't you cut a hole in the bottom plate of the radiation shield  for small fan?

[DaculaWeather]

I suppose you could... but if the fan pulls then I would wonder if I'd get enough air flow?

[DanS]

I tried the solar hat setup a couple years ago and found I got spikes on my temperature charts from the motor brushes. I believe member Axelvold, Lars, built one from the top vent/cap type  http://www.wxforum.net/index.php?topic=3670.msg30274#msg30274.

[DaculaWeather]

That's why I didn't want to blow the air on it, heat from the fan motor would change the readings.

[BigOkie]

That's why I didn't want to blow the air on it, heat from the fan motor would change the readings.

I put the fan at the bottom on mine, drawing the air down.

http://www.flickr.com/photos/oilerfan/sets/72157624157987690/

you've probably already seen this though.  Built it in April of 2010 initially, and then modified it properly and photo-documented while I did so.