Thanks Karl, I'll look into it carefully.
But as shipping weight, including packaging, is a mere 4 lbs,
it's hard to imagine the actual weight on this 3" diameter unit
being too much for a fiberglass Westy roof.

And properly installed, allowing for differences between a
Westy's fiberglass roof & the normal installation of these units
on sailboat cabin tops, I can't see why they would leak!  They
are, after all, designed for offshore boating!  As a sailor myself,
& former owner of a 32' Ericson, I have much respect for West Marine's
products.  And these units have been around for years.

I intend running this by my pal & fellow listee, Jon Casey, who
is both a Westy owner & an experienced blue water sailor.
As far as I'm concerned, his advice on this matter is sure to be
the most reliable.
Steady as she goes,
Phaedra

----- Original Message -----
From: Karl F. Bloss <bloss@ENTER.NET>

> Just watch the weight.  Chris Turner told me of a van that had this
installed
> and it became leak central.  The fiberglass cracked and because the fan
unit
> was heavy, it caused the roof to be concave and thus all rain and
condensation
> would run there, then into the cracks and into the van.
>
> -Karl
>
> > Volks, I am considering installing just such a vent on my '85.
> > West Marine offers a good quality line of stainless solar
> > powered vents, normally sold for installation on the cabin
> > tops of sailboats.  Check 'em out, they're gorgeous!
> > Phaedra