Ventilation during rain - Fiberglass RV


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Old 02-17-2019, 04:32 PM   #1
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Ventilation during rain

How do you keep your RV ventilated during period of heavy rain in hot weather? I have MaxxAir Window Maxx air vents on my Casita but they are no longer made, and I cannot find any knockoff or substitute for this type of product. I now own a BigFoot and it has the same type of sliding windows.
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Old 02-17-2019, 04:55 PM   #2
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I have one window under the awning and a Maxxair Deluxe roof fan that is rain shielded. Between the two I can ventilate even during a downpour.
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Old 02-17-2019, 05:11 PM   #3
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Thanks Steve, but I thought that awnings were to be used as sunshades, and not in the rain. What happens when it is both raining and windy?
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Old 02-17-2019, 05:25 PM   #4
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I have a MaxxAir Fan Mate which is a cover for the Fantastic Fan. They don't make the particular model I have any longer but they have other offers. I depend on the bath vent to provide cross ventilation in the rain.
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Old 02-17-2019, 05:59 PM   #5
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Time to upgrade to a model with awning windows and a MaxxFan with built in rain guard.
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Old 02-17-2019, 06:14 PM   #6
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Thanks Steve, but I thought that awnings were to be used as sunshades, and not in the rain. What happens when it is both raining and windy?

In rain and wind, I often reef the awning in so it's a half or third open. It still serves to shield the door and windows.
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Old 02-17-2019, 08:24 PM   #7
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In rain and wind, I often reef the awning in so it's a half or third open. It still serves to shield the door and windows.
Same here. Our Carefree Fiesta awning is quite sturdy even in some serious wind and rain, provided it's only deployed out a couple feet. We weathered a very strong storm a couple of years ago down on the gulf coast, torrential rain and strong winds, and the awning deployed about 2 or 3 feet worked fine, even though the manufacturer says that's a no no. If it could handle that, your average rain storm is no problem.
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Old 02-17-2019, 10:37 PM   #8
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How do you keep your RV ventilated during period of heavy rain in hot weather? I have MaxxAir Window Maxx air vents on my Casita but they are no longer made, and I cannot find any knockoff or substitute for this type of product. I now own a BigFoot and it has the same type of sliding windows.

Are you saying you don't have a roof mounted fan? and you need something for the windows? Is there any way to put an electric (or battery operated) stand alone fan near the window and push moisture out that way? I've never tried that, but it's a thought.


Good luck as you sure want to get that moisture out. I'd also carry some of those Dri-Z type pellets with you (or something similar) to help absorb the moisture.
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Old 02-18-2019, 05:21 AM   #9
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Thanks for the thought Laura. We do have a fantastic fan. But the way we currently use it is to have a window open, protected by the window Maxx from rain intrusion, which allows air to flow in, and run the ceiling powered fan to take air out. This method has always worked well for us.
Without being able to open a window to allow air in just running a ceiling fan would be much less efficient. So I am hoping someone will have come up with a way to cover the window so it can be open but not allow rain in during periods od heavy blowing rainstorms, such as we have in the southeast.
Leaving the awning out a bit might do it, and which I will try out. I have contacted a company which may be willing to make something similar to the window Maxx, but perhaps out of a different material and somewhat different design.
For instance, someone put one of those auto window vents, which runs along the top of the side vehicle window, on a Casita window. It looks great, but as far as I can understand it, will do nothing to keep the rain out. Still, it is an interesting attempt.
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Old 02-18-2019, 05:33 AM   #10
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Steve L., I will give your idea a shot also. I will be putting a vent cover over the Fan-Tastic fan. The bathroom fan is a small exhaust fan of dubious origin. I may remove it and install another fantastic fan in its location, but will wait and use it a bit first. It does not yet have a rain cover, so not sure I will use it when raining. Also the two fans are close to each other, so having air come in out and out the other may not be optimal.

I will pursue the cross ventilation possibilities, which seems the ideal way to maximize airflow, but finding a way to keep the window open with no rain intrusion seems remote at this point.
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Old 02-18-2019, 05:47 AM   #11
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To be clear, I vent the Fantastic fan out and I just open the bath fan. I don't run the bath fan (except for showers). The FF just sucks air "backwards" through the shower fan opening. It helps me if I crack the bath door a bit too.
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Old 02-18-2019, 06:00 AM   #12
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Seems reasonable Steve L. I pick up the unit from the dealership tomorrow. Since it is projected to rain continuously for the next few days here in the SE, I will give your method a try.

Sending you a private message.
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Old 02-18-2019, 06:35 AM   #13
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I have a bigfoot 17 and for the ventilation I have a maxfan in the main room and an air access of 14 "in the bathroom I make the IN fan work and exit the air by the bathroom trap which is provided with a maxair cover
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Old 02-18-2019, 08:52 AM   #14
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Thank you Yvon. Steve L said something similar. I will try your method.
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Old 02-18-2019, 09:16 AM   #15
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I followed a similar discussion here on FGRV years ago when we owned a Scamp with slider style windows. I learned of the Maxx window vent and installed them, but did not have anything but the escape hatch on the roof, so not enough air movement was the norm during warm rainy days. When we ordered our Lil Snoozy, I ordered Jalousie windows from HEHR and had LS install them in place of the slider style windows they normally use, and I also had them install a MAXX FAN instead of a Fantastic Fan they normally use. I really want to thank everyone who shares their knowledge and experiences here, so others can enjoy better outcomes with their set-ups.
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Old 02-18-2019, 10:18 AM   #16
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For instance, someone put one of those auto window vents, which runs along the top of the side vehicle window, on a Casita window. It looks great, but as far as I can understand it, will do nothing to keep the rain out. Still, it is an interesting attempt.

Okay, I think I kind-of know what you're talking about, however I'm clueless about this Window Maxx fan, having never seen one. (Or if I have, I didn't realize what I was looking at.)


So, you want to keep the rain out but not put your awning out due to the rain and/or wind. I get that. I don't put mine out when it's raining as I don't want to put it away wet as I really don't want to deal with mold up there. Where I park the trailer at home I can't deploy the awning more than a few inches. However, that will change in a few months when we remove the old, rotting shed and put in a new one much farther back.


Anywho - have you thought about some sort of temporary awning? I remember seeing someone with one of those at the Bandon OR rally last summer. It was attached with suction cups, I believe. That way you could have one over just the window you want to open for ventilation. I don't know how sturdy it would be for wind, though.
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Old 02-18-2019, 11:37 AM   #17
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This is a Window Maxx. Works very well.

Trying to upload pic, does not seem to be working.
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Old 02-18-2019, 11:55 AM   #18
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Any ideas where you can still find window_max... I thought they had been discontinued
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Old 02-18-2019, 12:18 PM   #19
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Laura

This is a Window Maxx. Works very well.

Henry - thanks! I remember seeing those on some websites but didn't remember/realize that's what they're called.


Nifty idea! I hope you can get it figured out. :
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Old 02-18-2019, 12:44 PM   #20
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They have been discontinued. Nobody is sure why, since so many people would like to buy one.
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