[PSUBS-MAILIST] circulation fan

[hank pronk via Personal_Submersibles]

Brian,You are brilliant!  I too have a marine engine compartment fan.  Your use of a rheostat on that fan for circulation is a perfect idea.  I am going to copy that idea but go a step further and use a PWM speed controller on it so I can reverse it.  I use that fan for cooling the sub and periodic air circulation.  Mostly though it is for bringing in fresh air from outside with a flexible hose.  By reversing it, I can push inside air out or bring outside air in.   Hank
I am a bone head!  I left three wires exposed waiting for a new switch in my hand held motor control  panel.  They shorted and melted the feed power wire, now it is a full day job to replace the multi wire cable ;-( 
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