Re: [Amel Yacht Owners] Exhaust Fan for Cabin - Opinions?

Alexandre Uster von Baar
 

Bill (R) used computer fans!
I bought some, but haven’t had time to do that.

Sincerely, Alexandre
SM2K #289 NIKIMAT
Port de Gustavia, Saint Barthélémy, FWI




--------------------------------------------

On Tue, 6/27/17, sailor63109@... [amelyachtowners] <amelyachtowners@...> wrote:

Subject: [Amel Yacht Owners] Exhaust Fan for Cabin - Opinions?
To: amelyachtowners@...
Date: Tuesday, June 27, 2017, 11:51 AM


 









I'm thinking about building an
exhaust fan that would temporarily lay over the outside of
one of the Goit hatches.  It would be for use at anchor (or
at the dock to save on air conditioning) to draw the cool
evening air in and give a nice
breeze.
It's a similar
principle to a "whole house fan" for those
familiar with them.
I found a 16" diameter fan
meant to cool a truck radiator that runs on 24 volts at 6.5
amps for about $180 see - http://www.jegs.com/i/Flex-a-lite/400/39624/10002/-1 
A fan meant to put up with road conditions should be fine
outdoors, especially considering the northern roads get
salted in the wintertime during snowfalls.  It has a
plastic blade and housing.  It says it's quiet, but
that's always a bit of a crap shoot.
This fan pulls almost 2000 cfm (note
Hella Turbo Fans are 200 cfm on high speed).  If you closed
the aft cabin door at night and opened the two small hatches
you might not get the whole 2000 cfm, but even half of that
would give you an air change every minute or two.  Imagine
how much cooler it would be even on a warm night.  If you
have several couples aboard you could put it on the main
cabin hatch and it would pull air from the whole
boat.
You could also use this
in the cockpit to cool off in the evening and keep the bugs
away or in the engine room.
The 12 volt version is only $100 and
pulls a few more CFM, if you want to play with a
converter.
If I go ahead with
this I'll build a box style frame for the fan out of
plastic wood (deck product from Home Depot or similiar) of a
size that would fit against/over the Goit frames on the
outside.  Slap some rubber on the part against the boat to
damp out vibration noise and Bob's your Uncle!   It doesn't come with a
switch, and is meant to directly connect to the
batteries.The fan
is reversible and you could use a "PWM" switch to
modulate the fan speed and direction (I'll have to study
up on PWM switches to be sure this is
workable). 
The worst
job for me will be installing a 24 volt outlet in the fwd
and aft cabins.  The wiring in the aft cabin should be easy
enough, just interrupt the dinghy inflator and put branch
wire one into the aft cabin.
This seems like such an easy thing to do
I'm wondering why you don't see it in the marine
catalogs?
Has anyone else done
this, or have any suggestions?
Thanks,DuaneWanderer,
SM#477
















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