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Old 06-28-2006, 11:35 AM   #1
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reverse switch on Fantastic Vent

Good day all,

In searching the forums, I've come to realize that the reason my two fantastic vents in my '06 bambi do not reverse is because Airstream specs (for RVIA standards) them that way. What a bummer. I can see why the sleeping compartment fan would not reverse with proximity to the poop-pipe, but why spec no-reverse for the front vent? I wouldn't think that the front vent would pull sewer gasses in, from it's position.

I'm not positive which model number I have (checking today), but both fans have a on/off, rain sensor, thermostat, and hatch open/closed switch. I beleive that is the 6000RBTA (without the reverse obviously).

I did however call Fantastic Vent this morning and the tech support lady said I can simply replace the on/off swith with a new switch that allows a motor reverse. 24 bucks for two of them. Not too bad.

Is this an easy install? She certainly thought it was a straight forward one? Anyone done it?

thanks,
b.
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Old 06-28-2006, 12:23 PM   #2
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I knew that the fan closest to the vent stack didn't reverse (my rear vent will not), but my front fan does. Could this possibly be a factory installation error?

Jack
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Old 06-28-2006, 12:50 PM   #3
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Quote:
Originally Posted by jcanavera
I knew that the fan closest to the vent stack didn't reverse (my rear vent will not), but my front fan does. Could this possibly be a factory installation error?

Jack
certainly possible, both of them seem to go in the same direction. Perhaps Airstream is just installing the one-way fans as standard in the newer models? Conspiracy!

b.
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Old 06-28-2006, 01:23 PM   #4
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It's no error. Both my front and back have no reverse either.

I seem to recall one of two truths when we talked about this back during the 2004 model year run. There was either a change in production, I seem to recall (don't quote me on this) that the factory was abandoning the reverse feature across the board, or just on the non Classic lines. I believe the first to be true and a good test of it would be to ask a post 2004 model year Airstreamer if they have a reverse feature anywhere. The answer will be either no not at all or yes, I have a Classic and it's got it in front. I haven't seen a Bambi/Safari with the reverse feature and the factory refused my request for one on a 12/03 production month. I believe whatever change took place, happened between Jack's build month and mine in 2003 (2004 model year)-- about a 3-4 month window.

If you call the folks at Fantastic Vent, they will sell or send you the kit to make it a reversable fan, however, I agree that you might not want to install the kit near the tank vent pipes.
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Old 06-28-2006, 02:49 PM   #5
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it is an RVIA thing

Our 03 22' CCD had the wonderful bi-directional fans but subsequent trailers (04 & 06) have not. We were told in 04 that they were no longer available because of an RV industry (safety?) ruling. I forget the exact reason. I'm pretty sure we couldn't even get an aftermarket or dealer installed reversing fan but I would check with Fantastic Fan.
-KL
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Old 06-28-2006, 02:56 PM   #6
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The only thing I can think of was the fact of not wanting to suck in sewer gas. I can see RVIA maybe being interested in that.

What's interesting is that I never ran the front fan in reverse until this year. On a trailer that has been closed up that has baked in the sun, the fan blowing in the intake mode really provides a faster comfort level to the occupants than running in exhaust mode.

Jack
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Old 06-28-2006, 03:06 PM   #7
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The newer Airstreams don't have reverse in either front or rear Fantastic Fans. I was told by sales at Colonial Airstream that it does have something to do with an industry saftey ruling.
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Old 06-28-2006, 03:47 PM   #8
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Big brother protecting us again! Aside from noxious odors, I can't imagine any gases emitted from a 35 gal holding tank in sufficient quantity to be harmful. I think that most of us will be able to ascertain that the vent fan is the culprit - and either reverse the flow (---which I think is a terrific option) or close the vents. With both fans fixed to exhaust only, your only option is to open a lower window. A hidden problem is that if you accidentally create a slight negative pressure with both fans running - and without adequate window openings - you're going to get a delightful whiff from the holding tank when you flush the toilet! This is the same problem that exists with the f--t fan in the bathroom if you forget to shut it off before flushing - and the trailer is closed up tight!
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Old 06-28-2006, 03:52 PM   #9
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Another great example of some product improved beyond all utility-or nearly. At least, for now, owners can still modify their own machines! Fortunately, in this case you need only buy replacement switches. It is nice feature and worth the effort.
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Old 06-28-2006, 04:42 PM   #10
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Fantastic Fan sent me one of the reversing switches and my son installed it for me several months ago in my front fan in the living room area. I talked with them on the phone, describing both my fans to them, and as I recall they said it wouldn't be practical to switch my bedroom fan.

My son talked to the guy at Fantastic Fan on his cell phone, as he was doing the install, and the guy walked him through how to do it. It was a simple process for my son, but it would have been beyond my simple capabilities. It involved cutting and rerouting a couple of the wires - not too involved, but not something I would have done on my own. It was about a 5 minute job. (I held the screw driver!)

I did install 2 MaxxAir roof vent covers on my own though -- the large sized ones designed for high speed fans. The combination of both of these things - the reversing switch and the vent covers - was one of the better additions to our trailer we've done this year.

John
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Old 06-28-2006, 05:26 PM   #11
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Quote:
Originally Posted by silverback
Our 03 22' CCD had the wonderful bi-directional fans but subsequent trailers (04 & 06) have not. We were told in 04 that they were no longer available because of an RV industry (safety?) ruling. I forget the exact reason. I'm pretty sure we couldn't even get an aftermarket or dealer installed reversing fan but I would check with Fantastic Fan.
-KL
Fantastic Fan installed a reversing fan in the rear of our Overlander, with no argument. They did tell me that under certain conditions, it could pull black tank gases into the coach, and if I smelled something bad, to reverse the fan. I guess they decided I was smart enough to not keep inhaling sewer gas.
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Old 06-28-2006, 08:35 PM   #12
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I may have to give Fantastic Vent a call I would love to get a reversing fan mod installed in the front. It is so cool (pun intended) to have one pull in the air while the other one is pushing it out. You can keep the gatos happy inside all day without running the air or opening windows.
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Old 06-28-2006, 10:00 PM   #13
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Just my $.02 here, but my 19CCD came with a front Fantastic fan and a rear dead vent. If one were to open the rear vent and operate the front fan on exhaust, it pulls in a great deal of air from the dead vent........and possibly tank fumes as well, just like the scenarios described above.

I have changed BOTH of these to bi-directional MaxxAir fans and I can have a push-pull in either direction.........AND I just used both in the pouring rain while overnighting at a rest stop outside Tallahassee, FL on the way to NM and OR. NOT A DROP inside!!

I love these fans!!!!
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Old 06-28-2006, 10:49 PM   #14
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Quote:
Originally Posted by lewster
Just my $.02 here, but my 19CCD came with a front Fantastic fan and a rear dead vent. If one were to open the rear vent and operate the front fan on exhaust, it pulls in a great deal of air from the dead vent........and possibly tank fumes as well, just like the scenarios described above.

I have changed BOTH of these to bi-directional MaxxAir fans and I can have a push-pull in either direction.........AND I just used both in the pouring rain while overnighting at a rest stop outside Tallahassee, FL on the way to NM and OR. NOT A DROP inside!!

I love these fans!!!!
I wonder why Airstream doesn't offer the MaxxAir fans in lieu of Fantastic Fans? It seems to me that they are caught in a time warp with Fantastic Fans.

One of the reasons we added covers to our fans was so we could do exactly what you did at that rest stop. Another reason was to be able to run our fans in the strong afternoon winds that we often experience here in the northwest in the summer that forced us to close the Fantastic Fan for fear the cover would blow off before we added the MaxxAir vent covers -- I know that the wind never blows in Hood River, Or though.

John
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