Ventilation fan

Nov 26, 2008
1,970
Endeavour 42 Cruisin
I have a spare exhaust fan port from a long removed diesel genset. 4" vent hose to a clamshell outside that was used to move heat out of the genset space.
Thinking of running the vent hose low into the bilge under floorboards and adding a new vent fan. The boat is a 1985 Endeavour 42.
So what I'm looking for is a very low noise and low power draw 'computer fan'. I'm not sure how much cfm I would need to move some air, just enough air to get some recirculation into the bilge to move stale air out.

The tradeoffs are decent cfm while quiet with low power draw.

Thanx
G
 
Feb 10, 2004
4,233
Hunter 40.5 Warwick, RI
Pretty much any decent quality 4" or 100mm 12V computer fan should be quiet enough under the sole. Pick one that says it is quiet. Rather than pushing the air into the hose from under the floor boards, I would place the fan near the output and pull the air from the hose. If you do that, be sure that water cannot get to the fan through the clamshell.