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Old 03-03-2020, 08:26 AM   #1
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Reverse Flow Fantastic Fan?

I have two Fantastic Fan models with rain sensors on my 2018 Flying Cloud 19í. I have seen some Fantastic Fans that allow one to reverse the flow of air. (My Airstream is in storage at the moment so I canít check it). Is this feature standard on my installed Airstream fans or would I have to upgrade / install to a different model ?
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Old 03-03-2020, 08:30 AM   #2
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If your fan has that feature, it would have a large rocker switch that has 3 positions. IN - OFF - OUT
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Old 03-03-2020, 09:04 AM   #3
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Reverse Flow Fantastic Fan?

It is possible to add a reversible switch to existing FantasticFans yourself. Search the forums for the method and parts needed.
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Old 03-03-2020, 09:32 AM   #4
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I'm pretty sure that our colleague Rocinante did a video on reversing the flow. I don't think it was switchable, it was a permanent "in" flow. But for those of us with two hatches, that's a pretty useful deal. You might contact Rocinante or look at their great website ... he's a pretty good guy and they give great advice.
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Old 03-03-2020, 09:40 AM   #5
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Quote:
Originally Posted by tjwoods1 View Post
I have two Fantastic Fan models with rain sensors on my 2018 Flying Cloud 19’. I have seen some Fantastic Fans that allow one to reverse the flow of air. (My Airstream is in storage at the moment so I can’t check it). Is this feature standard on my installed Airstream fans or would I have to upgrade / install to a different model ?
According to the parts manual for your trailer there is no reverse. It says "exhaust only" on page IV-72.
https://www.airstream.com/wp-content...Parts-Book.pdf

It is not hard to add a switch that will allow the fan to reverse. Plenty of youtube videos show how to DIY cheap.

And Fantastic has an upgrade kit that is plug and play.
https://www.amazon.com/Fan-Tastic-Ve.../dp/B00IKMBXY2
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Old 03-03-2020, 11:25 AM   #6
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Quote:
Originally Posted by tjwoods1 View Post
I have two Fantastic Fan models with rain sensors on my 2018 Flying Cloud 19’. I have seen some Fantastic Fans that allow one to reverse the flow of air. (My Airstream is in storage at the moment so I can’t check it). Is this feature standard on my installed Airstream fans or would I have to upgrade / install to a different model ?
Call them. I've seen (here) that they can supply a kit to add this feature.


Infact, google says >> https://www.campingworld.com/fan-tas...ite-56327.html
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Old 03-03-2020, 01:37 PM   #7
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Not a believer in one in and one out anyway. The hot air is at the ceiling. 2 blowing out has to be better. Plenty makeup air comes in through the window and doors. I have fans with the reversing feature but have not used it except to try it to see if it worked. If it gets hot enough I probably will have the AC on instead.
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Old 03-04-2020, 10:00 AM   #8
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We have this on our 2004 Int'l 25 however, like Bill M. we run both out only with windows open there is MUCH better circulation.
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Old 03-04-2020, 10:43 AM   #9
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The easy way...

Open BOTH vents

Close ALL windows including shower and bathroom vents

Turn ON one fan!

Viola!

You have one vent pulling in the air while the vent with the fan ON will pull air out.
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Old 03-04-2020, 02:25 PM   #10
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Originally Posted by Bill M. View Post
Not a believer in one in and one out anyway. The hot air is at the ceiling. 2 blowing out has to be better. Plenty makeup air comes in through the window and doors. I have fans with the reversing feature but have not used it except to try it to see if it worked. If it gets hot enough I probably will have the AC on instead.
Hi Tom, I'm with Bill and drbrick. Our OEM's (2014) were one way but were replaced under (parts only) warranty by FV in 2017 & 2019. The base flanges had cracked and I was seeing some moisture inside.

The new fans (3350) they sent came with the Fwd/Rev switch. Another benefit I discovered was the fan blade assembly was more easily removed from the inside for cleaning of the rotor and/or the inside of the dome.

Not to digress...my experience is that while 2 fans (on high) and on exhale certainly clears the cabin, I found it to be noisier. Now I exhale the Fwd fan above the dinette, rung it on #1...maybe 2, and cracking my dinette window (with shade down) and sometime the rear sink window (again shade down) , even just a couple of inches (before the first stop) was more efficient and certainly quieter. I prop them open with small sections of foam pipe insulation, so if the blow away, no big deal.

The only time I use the push/pull method is when I'm parked while OTR and the dog is inside. At those times I feel more comfortable keeping the vents open vs opening a window on an unattended TT.

Happy Trails,
Bob
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Old 03-04-2020, 02:44 PM   #11
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Another reason to use one fan blowing in, one fan blowing out ->

When one or both fans are blowing outward negative pressure is created (suction pulling air inside from outside). If the toilet is flushed while the fans are running air will be sucked in through the black tank vent through the tank and through the toilet. THATSTINKS!

If one fan is blowing inward on a slightly higher speed than the one blowing outward the interior is pressurized so that no smell comes in when the toilet is flushed.
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Old 03-04-2020, 03:53 PM   #12
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Bingo!

Thatís not a fun experience...
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Old 03-04-2020, 04:56 PM   #13
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Originally Posted by A W Warn View Post
Another reason to use one fan blowing in, one fan blowing out ->

When one or both fans are blowing outward negative pressure is created (suction pulling air inside from outside). If the toilet is flushed while the fans are running air will be sucked in through the black tank vent through the tank and through the toilet. THATSTINKS!

If one fan is blowing inward on a slightly higher speed than the one blowing outward the interior is pressurized so that no smell comes in when the toilet is flushed.



maybe this is where covering the toilet with plastic comes into play... post #34
https://www.airforums.com/forums/f45...-205907-2.html



p.s. just for the sake of discussion, would not the bath fan accomplish the same thing? I guess at least it would exit the bathroom ceiling.
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Old 03-04-2020, 05:04 PM   #14
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One thing that having the fan reversible does, especially for AS owners:

Put the fan on INTAKE, close and seal all windows and doors, then go outside and start squirting seams with a dilute dish soap solution. Instant leak detection!!
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Old 03-04-2020, 05:52 PM   #15
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Pretty sure you will find that with the Rain Sensor you also have reversing switch
Both of mine do...one with rain sensor the other without!
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Old 03-04-2020, 05:57 PM   #16
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One thing that having the fan reversible does, especially for AS owners:

Put the fan on INTAKE, close and seal all windows and doors, then go outside and start squirting seams with a dilute dish soap solution. Instant leak detection!!
Good idea!
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