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Old 03-10-2015, 06:45 AM   #101
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I think I'm going to add two Camco vent covers so that when its raining I can keep the vents open.


Camco 40431 RV Roof Vent Cover White New Free Shipping | eBay
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Old 03-10-2015, 07:34 AM   #102
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never realized they were that cheap. heck yeah!
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Old 03-10-2015, 07:36 AM   #103
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I've found with RV parts that prices can vary wildly from vendor to vendor.
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Old 03-10-2015, 04:24 PM   #104
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fyi, maybe not exactly the same as mine, they dont work very good, heat can only come and go from same end and they are not very good heat exchange

I have a plan to add "a roof" to each hatch that is basically a flat pc of sheet metal(alum) that extends about 8 in past plastic, that way I can keep hatches open for ventalation
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Old 03-10-2015, 04:24 PM   #105
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they make ones that have a round hole that faces down with a fan in them, I have witnessed these on race car trailers and they do work goo, just too much $$ for me right now
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Old 03-10-2015, 04:39 PM   #106
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Quote:
Originally Posted by EastCoastCB View Post
I've found with RV parts that prices can vary wildly from vendor to vendor.
Yes, and they are all flimsy, poorly made, meant for part time, limited use.

Go residential stuff whenever you can. It's made for everyday use. Prices are better due to competition between manufactures.

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Old 03-10-2015, 05:42 PM   #107
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so, im thinking about a vent at floor level/rear of bus, and an exhaust fan at roof level/front of bus. what do yall say?
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Old 03-10-2015, 06:48 PM   #108
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Would you be trying to bring outside air in from the rear vent and then have it travel to the front and get pulled out from the exhaust fan at the roof? I am just trying to understand. If you ran this setup while driving, I would be worried about rear exhaust and smoke getting in from the rear floor level vent.

My bus is a Crown and it came with factory installed passive round roof vents to help get rid of humidity and create an air exchange process. I beefed these two up by putting in 12 volt quiet fans in the vents. They can be operated by a switch on the dash.

Round vent opening behind the driver. There are two of these near the front of the bus. They are normally covered in a fine mesh grill work so they look nice in the headliner. This picture shows the round hole with the mesh off.



This is the same vent hole with the headliner removed and the 12 volt fan installed. This was before we had the roof cavity spray foamed and the headliner put back up.



The vents are covered by a little hood on the roof to allow air flow while still keeping out the rain. Unfortunately, I can't find any pictures of the front headliner area in its finished state, with the mesh grill put back up and the leather headliner covering. My next trip to the bus.

Bottom line, the more venting you have the better.
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Old 03-10-2015, 07:38 PM   #109
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they make ones that have a round hole that faces down with a fan in them, I have witnessed these on race car trailers and they do work goo, just too much $$ for me right now
Yes, those are the ones I got for fifty apiece!
And will be putting one of these over each vent-
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Old 03-11-2015, 07:25 AM   #110
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Would you be trying to bring outside air in from the rear vent and then have it travel to the front and get pulled out from the exhaust fan at the roof? I am just trying to understand. If you ran this setup while driving, I would be worried about rear exhaust and smoke getting in from the rear floor level vent.
yes, thats what im thiking. agreed on the smog while driving, but would close the vent then. the idea is to pull the cooler air from underneath the bus, circulate it and at same time, expel the hot air from ceiling level. but, only while engine off!
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