Camping world had the FF with rain sensor on sale for < $300 this summer.
In general the vent has a efficient 3 speed reversible 12 inch fan mounted in a 14 inch vent opening. It moves a lot of air. One fan can easily cool a < 30 foot RV. The rain sensor closes the top when it rains, allowing you to leave the vent open while away.
I have two of these fans in my International. The rear fan has a variable-speed cpntrol on the wall and the front fan (over the bed) has a 3-speed switch on the fan and a thermostat on the wall.
When it is cool enough here for no AC, I set the rear fan to blow in at fairly slow speed and the fan over the bed to blow out at the lowest speed; all windows closed. There are no drafts, that way, just a gentle breeze the length of the trailer. When it cools off enough at night, the fan over the bed turns itself off and the cover closes. The rear fan stays on, but doesn't afffect anything.
If it rains during the night, they both turn off and close. I had to test this to trust it, but they work like magic. Unless it is a flash downpour, long before there is enough rain to hurt anything, the fans turn off and the covers close. After the rain stops and a few minutes delay, the covers open and the fans go on again.
I would worry about a flash downpour, though, since it takes some time for the cover to close. This could be especially bad with the one fan located right over the bed.
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John W. Irwin
2005 Classic 28 "Sabre-Dog III"
2004 Silverado 2500HD Duramax/Allison
WBCCI Region 9 Webmaster, #9632
Thanks for the replies.
These things sound great, sorta like the attic fan that I grew up under. Plus a weatherman and a butler built in.
However I am shocked at the price.
Do yall reckon that it is primarily due to the rain sensor feature?
(That feature by the way sounds pretty mechanically fragile)Is it possible to close vent manually in case of malfunction with auto-closer?
Did the stock domes have fans? If so were they reversable?
Is there another company with a similar product?
Lastly are these things 12 v and 110 ?
Would yall reccomend DIYer installation?
Wonder what a shop would charge to install?
You can also search under "fantastic fan" for more info
They are probably the best fan, so they are expensive. I have heard of people having problems and they send replacement parts shipping paid and no real questions. I have never heard anyone complain about poor customer service.
Only 12v operation, not all of them have rain sensors and are quite a bit cheaper without.
My SOB motorhome has a power vent, the fan is about 4" diameter and you know it is running because it probably turns 4500 rpm (noisy), is not reversible (only exhausts, or is designed to exhaust; really just makes noise)
I have 2, installed both myself. The biggest thing is being careful not to damage the roof. If you are at all mechanical and have basic tools it is pretty simple. Not a direct replacement because of the opening size, but not that bad.
To operate the dome mamually, you just pull out on the knob to disengage the motor.
As posted elsewhere, their customer service is terrific.
I didn't trust mine until I worked inside the trailer for an intermittently rainy afternoon. Each time I heard rain of the roof, ddown came the dome covers.
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John W. Irwin
2005 Classic 28 "Sabre-Dog III"
2004 Silverado 2500HD Duramax/Allison
WBCCI Region 9 Webmaster, #9632
I installed a Maxx-Air dome over my Fantastic fan. It still allows the dome to open and the fan to operate without the worry of rain getting into the rv. You can view these at Camping World or Maxx-Air. Also, make certain you specify the model 800 as it has a screen covering the opening to keep the critters out.
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Jerry Sullivan
'01 Limited
'01 Safari
On The Road, USA
I don't have the rain sensor units nor is the airflow reversable on the two that I have. They are three speed and they do have thermostatic control so you don't get frozen out on real cool nights. I consider them one of the best investments to add to a travel trailer.
What we do at times is leave the front unit on and use the thermostatic control to operate the back unit with the fan master switch turned off. If it gets cool I set the unit with the running fan to shut off first. If it gets even cooler the back unit with the fan off will close the cover. Pretty nifty.
Jack
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Jack Canavera
STL Mo. AIR #56
'04 Classic 30' S.O.
'03 GMC Savana 2500
'08 Vespa GTS 250
I have had a MaxxAir and now a Fantastic Fan. The MaxxAir was the largest, reversable 3-speed offered. I thought it was the cat's meow at the time, now I have a Fantastic Fan my thoughts have changed. I have the 3-speed, reversable, rain sensor, themostat controlled model. It is quiet, the rain sensor works perfectly, the themostat is wonderful and the fan moves more air. I go to sleep with the fan on, thermostat set to my preference and when it gets colder at night or it rains, the fan shuts down and/or closes the vent. It only costs a few dollars more than the MaxxAir, but it is well worth it. I only have one in the living area of my 25' Safari, but by opening back windows and front windows the air is moved through-out the trailer. I would not have any trailer or M/H that did not have at least one installed. By-the-way, it is so efficient that I haver never had to operate it at anything other than the lowest speed.
Brian
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Brian
WBCCI #5167
2004 Land Yacht XL396
2003 25' Classic
2005 GMC Sierra
Brian is the Maxx-air the one with the hood-scoop looking cap?(turbo-Maxx I think)
They say it can be run when it is raining?
Although it looks to me like rain would splash/bounce into the cowl, I would think that running it during a rain would be helpful on a hot night.
why did you remove the Maxx-air?
If it was fan burnout..how longdid it last, and were parts not available?
thanks
Hex,
Yes it is a TurboMaxx. It will run while raining, in fact I left the vent open all the time. The only time I closed it was when I winterized. I had the TurboMaxx on a different unit that I sold.
I never had any problems with rain coming in the hood. On my new Airstream, I elected to put on a Fantastic Fan. As I said I like the Fantastic Fan more. Both are good products.
Brian
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Brian
WBCCI #5167
2004 Land Yacht XL396
2003 25' Classic
2005 GMC Sierra
This price reflects the cost of the product and, the labor charge by A/S factory.
'If I had done the work myself, it could've been done for less than 300$