Ventilation?

Ok, I'm hoping to get a bit of advice on this...
My trailer came with the high front and low rear plastic "vents" installed. (Like these: http://www.etrailer.com/Enclosed-Traile ... -AVT2.html )
I'm thinking of using the front one for a vent for the bathroom area by using a computer fan and some pvc piping. These fans usually are about 50-60 cfm, although are available to about 250 cfm..
I'm thinking of doing the usual roof install on a fantastic or maxxair type fan, but wondering if that much airflow is really needed?
My reasons for wondering are:
- Not wanting to cut a whole in the roof if not needed.
- If I installed 2 computer type vans - reversible, I could "double vent" air entering from windows or have one pulling air in and one pulling air out when the windows were closed.
- I will have A/C installed for use if it's too warm for the fans so I don't think I need a large amount of air flow.
- The computer fans draw almost nothing power wise and are very quiet. Additionally, a small solar panel could be added to run a fan while in storage to keep dampness from setting in.
My idea would be to recut/enlarge the holes from the vents and install a flange that could be capped off while driving to make them water tight when not in use. Unscrew the cap, screw in a elbow with bug screen installed. Bug proof, rain proof, low power and quiet...
Let me know what you think?
My trailer came with the high front and low rear plastic "vents" installed. (Like these: http://www.etrailer.com/Enclosed-Traile ... -AVT2.html )
I'm thinking of using the front one for a vent for the bathroom area by using a computer fan and some pvc piping. These fans usually are about 50-60 cfm, although are available to about 250 cfm..
I'm thinking of doing the usual roof install on a fantastic or maxxair type fan, but wondering if that much airflow is really needed?
My reasons for wondering are:
- Not wanting to cut a whole in the roof if not needed.
- If I installed 2 computer type vans - reversible, I could "double vent" air entering from windows or have one pulling air in and one pulling air out when the windows were closed.
- I will have A/C installed for use if it's too warm for the fans so I don't think I need a large amount of air flow.
- The computer fans draw almost nothing power wise and are very quiet. Additionally, a small solar panel could be added to run a fan while in storage to keep dampness from setting in.
My idea would be to recut/enlarge the holes from the vents and install a flange that could be capped off while driving to make them water tight when not in use. Unscrew the cap, screw in a elbow with bug screen installed. Bug proof, rain proof, low power and quiet...
Let me know what you think?