[drcoastline]

Hey guys, thanks for the input. A bilge blower is exactly the design I am looking for and was my first choice as it provides excellent air movement through the bilge because that is what was designed to do. Unfortunately it won't work in my application for several reasons. First they are designed to run for short periods of time. Five to ten minutes to clear a bilge of fumes prior to starting a gasoline engine then they are shut off. They are not designed to run 24/7 for days at a time. Second they draw a lot of power, I am looking for something that has a low power draw. First to keep my electric bill down if on shore power and second to keep a low draw on the batteries. If for some reason there is a power failure and my battery charger can not keep the batteries topped off, the fan will run the batteries down pretty quickly leaving the boat vulnerable as I won't have power for the bilge pumps in the event they are needed. Lastly is noise. Bilge blowers are noisy. No big deal during the day but at 3AM it might present a problem.

Island911- Make up air isn't an issue the engine vents will provide more than adequate air supply. Not to mention the construction of the boat is designed to allow air from above to be pulled down between the ribs into the bilge. What I am attempting to do is devise a system that will pull fresh air through the engine vents and from above down into the bilge and then vent out of the boat. Keeping a constant flow of fresh air through the bilge.

A computer fan has been mentioned to me before but I don't know anything about them or the amount of air flow they provide. If you can help educate me that would be great.

Look171 your suggestion may be what I am looking for and the flex duct is what I intend to use to exhaust the air.

onewhippedpuppy- In my boat sealing it up tight would be a death sentence for the boat. Keeping air flow is the prudent way to go as you suggest. That's why I am trying to devise a system to increase the airflow through the boat.