Reuben,
I posted yesterday to Jesse's post, so maybe you didn't get it. Here are my
drawings for the poptop hatch installation of the two Marinco Solar vent
models. As I said, I preferred to keep my cowl vent on the foredeck so I can
close it up for really bad weather.  The following is the entry I made in my
Project Journal for the Installation:

SOLAR EXHAUST VENTS – MARINCO Day and Day/Night Solar Vent
Modified Installation for Rhodes 22
I wanted to install a solar powered exhaust vent on my Rhodes but finding a
suitable location was challenging. The obvious location was in the existing
3” anchor chain locker opening. The problem with that location is reaching
the control and the removable screen. Also, keeping the Cowl Vent that can
be removed and capping the port was important to me, as well as providing
thru-cabin intake for the aft mounted solar vents. All other locations on
the foredeck or on the Cabin Top presented problems with tripping over it
when going forward, although with both roller furling and IMF main, it
shouldn’t be a problem, I just didn’t want to bore a hole in the deck. I
began considering mounting on the Pop-Top Slider. It’s out of the way,
provides a central but far enough aft location to draw air through most of
the boat.
I purchased the Marinco Solar Vent and decided on the Pop-Top location. Once
I had the vent I realized that the Pop-Top only allowed ¼” clearance from
the cabin top when in the forward position.  The Solar Vent required 1”
clearance. What to do?  Simple! Raise the Solar Vent up high enough to
provide the clearance. To do this, I used ½” and ¼” PVC plumbing “flange
spacers” plus a 1/8” neoprene gasket which I epoxied together to provide
7/8” lift, giving the clearance required. I used a 3-3/4” hole saw to bore
the hole, which I placed off center in case I wanted to add a second fan.
Since installing, combined with eliminating some port lite leaks, below
decks has improved considerably but still has a hint of the mildew odor when
opening up. One of the issues with the Marinco Solar Vent is that when the
sun goes down, so does the exhaust vent.  I have since purchased a Marinco
Day/Night Solar vent that does just that by charging an internal battery
during the day that will keep the fan operating all night.
		Modification for Day/Night Solar Vent
As things would have it, nothing is simple. The Day/Night model does not
have the same profile as the Daytime only model. It is about  2-1/2” taller
and requires more spacing. For this project, I cut a piece of 3” PVC
schedule 40 pipe to 2-1/4” which was epoxied to a ¼” flange spacer and
bolted to the Pop-Top Slider, separated by a 1/8” neoprene gasket.  Once  it
was in place it’s only a matter of adjusting the trim rings at top and
bottom.
The appearance on the Pop-Top slider is somewhat awkward because the two
vents are different heights, but	 the extra ventilation is much more
effective than with just one.


As for a drain in the anchor rode tray, I also have been wanting to install
one. Possibly a thru hull just aft and below the level of bottom of the
tray. It wouldn't need to be a sea-cock type. Look at the water tank and
holding tank vents port and starboard just below the toe rails.

Deck_Vents_Fore_and_Aft.jpg

Solar_Vent_Installation_PopTop_Sliding_Hatch.jpg

Solar_Vent_Installation_Marinco_Day-Night.jpg








-----
Joe Dempsey
s/v Respite 
Rhodes 22 1989/2005
Deltaville,VA
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Sent from: http://rhodes-22.1065344.n5.nabble.com/