Fitting mushroom vent

[FergusM]

As I do a fair bit of cooking, I want to fit a mushroom ventilator above the galley on my Hunter Horizon 21. Gael Force have a nice Vetus unit, with built-in midge screen (essential in the West of Scotland!). It would fit through the grp cabin top OK, and there is a flange underneath. However, my problem is the headlining. I want to be able to remove it easily for access to the underside of the deck in case I want to fit or remove deck hardware or check the wiring to the cabin light. There would need to be a hole cut in the headlining below the vent. How can I finish off the exposed edge round the hole neatly?

One idea that struck me was a metal, wood or plastic ring with a flange top and bottom which could go into the hole, but I have no idea if such a thing is available.

Any ideas?

 

[VicS]

As I do a fair bit of cooking, I want to fit a mushroom ventilator above the galley on my Hunter Horizon 21. Gael Force have a nice Vetus unit, with built-in midge screen (essential in the West of Scotland!). It would fit through the grp cabin top OK, and there is a flange underneath. However, my problem is the headlining. I want to be able to remove it easily for access to the underside of the deck in case I want to fit or remove deck hardware or check the wiring to the cabin light. There would need to be a hole cut in the headlining below the vent. How can I finish off the exposed edge round the hole neatly?

One idea that struck me was a metal, wood or plastic ring with a flange top and bottom which could go into the hole, but I have no idea if such a thing is available.

Any ideas?

I have acouple of 4" mushroom vents. the mounting flanges are on the outside though not inside

This photo shows how the lining is finished off around the one in the f'c's'l.
IIRC I lined the hole in the headlining board with a little of the lining material with the foam stripped off .Then cut the main lining so that it could be folded back through the hole and stuck down on the reverse side of the board.

You should be able to zoom into the picture to see it fullsized

http://i50.photobucket.com/albums/f337/Vic43/Forums 2013/DSCF0854.jpg~original


I lined the galley area with decorative finished aluminium so no problem there

http://i50.photobucket.com/albums/f337/Vic43/Forums 2013/DSCF0852.jpg~original



I found some "soil pipe" that matched the size of the ventilators so lined the holes through the foam cored deck with that.


BTW after 30+ years the original Souwester vents were begining to show their age and effects of UV and I have replaced them with some very inferior ones of unspecified origin. I thought I would break the originals removing them but in fact they came out easily and after a couple of coats of paint are ready to refit in place of the new ones!

 

[VicS]

Now looked at the Vetus and Gael Force websites

Presumably you are looking at one of the mushroom ventilators on this page http://www.vetus.com/ventilation/deck-ventilators.html

They fix to the outside but are supplied with a plastic "trim ring", called a "counter flange" or "finishing ring" on the Gael Force website. Wont that solve your problem regarding a neat finish on the inside?

 

[FergusM]

Thanks, Vic, for both your responses. You certainly made a neat job of it (and how nice the interior of your boat looks).

You correctly point out that there is a trim ring with the vent. That was not immediately obvious to me from my first look at the Gael Force website, so I phoned them, and the young lady who answered said she did not really know how the inside was finished, which is why I posted the original question.

Hopefully, that ring will be a neat solution. Otherwise, I will ask my wife to trim the headlining in the way you suggest. She has much steadier hands than I do!

 

[rob2]

I think the plastic trim is really onlu suitable to fit to the hole through the coachroof. For a really neat finish to the headlining, a wooden ring screwed up to the coachroof would be ideal (in addition to the plastic trim).

Rob.

P.S. On second thoughts, you could cut the aperture in the headlining for a fairly close fit and push the plastic trim through, screwing it to the roof.

 

[FishyInverness]

You correctly point out that there is a trim ring with the vent. That was not immediately obvious to me from my first look at the Gael Force website, so I phoned them, and the young lady who answered said she did not really know how the inside was finished, which is why I posted the original question.

Sorry, I wasn't paying attention, not like me! (Possibly busy, rampant season this one i'm hardly even managing to flick through the forums! ) - We currently have 1 of the 150mm Vents showing in stock, would you like me to take a look at it for you and report?

Cheers

Nik