Installing large vent fan in bathroom of a Royale?

A

aaron bush

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Sep 1, 2017
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I'd like to install a maxxair fan in the bathroom of my Royale - it looks like there is a support rail (running front to back) in the roof over the
dry part of the bath so there isn't enought room there. Does anyone know if the section over the shower has enough room? I know people have done it
on their non-coachman coachs, but I don't think I've seen it on a Royale.

I looked in the parts book, but can't really tell from the drawing there if there is a support rail there or not.

This is a side bath.

cheers,

Aaron

--
78 Royale, rear dinette
 
I wonder if a stud finder could map the rails from the top side down?

> I'd like to install a maxxair fan in the bathroom of my Royale - it looks
> like there is a support rail (running front to back) in the roof over the
> dry part of the bath so there isn't enought room there. Does anyone know
> if the section over the shower has enough room? I know people have done it
> on their non-coachman coachs, but I don't think I've seen it on a Royale.
>
> I looked in the parts book, but can't really tell from the drawing there
> if there is a support rail there or not.
>
> This is a side bath.
>
> cheers,
>
> Aaron
>
>
> --
> 78 Royale, rear dinette
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

--

*John Phillips*
 
If you have a good stud finder, they will work to find the ribs. If I
recall correctly, there is a 14 x 14 opening in the rib structure on some
coaches with dry baths on the sides. Don't know if all of them do.
Jim Hupy

I wonder if a stud finder could map the rails from the top side down?

> I'd like to install a maxxair fan in the bathroom of my Royale - it looks
> like there is a support rail (running front to back) in the roof over the
> dry part of the bath so there isn't enought room there. Does anyone know
> if the section over the shower has enough room? I know people have done
it
> on their non-coachman coachs, but I don't think I've seen it on a Royale.
>
> I looked in the parts book, but can't really tell from the drawing there
> if there is a support rail there or not.
>
> This is a side bath.
>
> cheers,
>
> Aaron
>
>
> --
> 78 Royale, rear dinette
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

--

*John Phillips*
_______________________________________________
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Unsubscribe or Change List Options:
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Aron,
Since you will tend not to walk around that area, one can cut the stringers
and let the Max air act as support.
You can go toward the curved portion and the unit will have a slight gap
that can be filled up with roof putty.
Always check that there will be clearance when the lid is opened.
Max air units have two arms and they mention that you can drive with it
open.
If you like, call me and I'll give you measurements on my install.

> I'd like to install a maxxair fan in the bathroom of my Royale - it looks
> like there is a support rail (running front to back) in the roof over the
> dry part of the bath so there isn't enought room there. Does anyone know
> if the section over the shower has enough room? I know people have done it
> on their non-coachman coachs, but I don't think I've seen it on a Royale.
>
> I looked in the parts book, but can't really tell from the drawing there
> if there is a support rail there or not.
>
> This is a side bath.
>
> cheers,
>
> Aaron
>
>
> --
> 78 Royale, rear dinette
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

--
Jim Kanomata
Applied/GMC, Newark,CA
jimk
http://www.appliedgmc.com
1-800-752-7502
 
The stringers are Al and welded.No steel.
You can droop the panel down a little and use a mirror and flashlight to
look.

On Sat, Sep 30, 2017 at 12:13 PM, Jim Kanomata
wrote:

> Aron,
> Since you will tend not to walk around that area, one can cut the
> stringers and let the Max air act as support.
> You can go toward the curved portion and the unit will have a slight gap
> that can be filled up with roof putty.
> Always check that there will be clearance when the lid is opened.
> Max air units have two arms and they mention that you can drive with it
> open.
> If you like, call me and I'll give you measurements on my install.
>

>
>> I'd like to install a maxxair fan in the bathroom of my Royale - it looks
>> like there is a support rail (running front to back) in the roof over the
>> dry part of the bath so there isn't enought room there. Does anyone know
>> if the section over the shower has enough room? I know people have done it
>> on their non-coachman coachs, but I don't think I've seen it on a Royale.
>>
>> I looked in the parts book, but can't really tell from the drawing there
>> if there is a support rail there or not.
>>
>> This is a side bath.
>>
>> cheers,
>>
>> Aaron
>>
>>
>> --
>> 78 Royale, rear dinette
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>
>
>
> --
> Jim Kanomata
> Applied/GMC, Newark,CA
> jimk
> http://www.appliedgmc.com
> 1-800-752-7502
>

--
Jim Kanomata
Applied/GMC, Newark,CA
jimk
http://www.appliedgmc.com
1-800-752-7502
 
1978 GMCs came with a large Hammond vent from the factory. Also the bath module fiberglass was made especially for the large vent. Measuring one
outside on the roof or from the inside or the top might help locate where exactly to mount yours.
--
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
 
Ken,
He has a Royal, so that is his concern.
On my Kingsly , we had to fab a outter trim on the inside to fill the gap
around the indent.

> 1978 GMCs came with a large Hammond vent from the factory. Also the bath
> module fiberglass was made especially for the large vent. Measuring one
> outside on the roof or from the inside or the top might help locate where
> exactly to mount yours.
> --
> Ken Burton - N9KB
> 76 Palm Beach
> Hebron, Indiana
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

--
Jim Kanomata
Applied/GMC, Newark,CA
jimk
http://www.appliedgmc.com
1-800-752-7502
 
Reading between the lines: Are you saying the roof structure differs year
to year and model to model? I thought the models were more paint schemes
rather than floorplans or structural differences.

> Ken,
> He has a Royal, so that is his concern.
> On my Kingsly , we had to fab a outter trim on the inside to fill the gap
> around the indent.
>

>
> > 1978 GMCs came with a large Hammond vent from the factory. Also the bath
> > module fiberglass was made especially for the large vent. Measuring one
> > outside on the roof or from the inside or the top might help locate where
> > exactly to mount yours.
> > --
> > Ken Burton - N9KB
> > 76 Palm Beach
> > Hebron, Indiana
> >
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> >
>
>
>
> --
> Jim Kanomata
> Applied/GMC, Newark,CA
> jimk
> http://www.appliedgmc.com
> 1-800-752-7502
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

--

*John Phillips*
 
Aaron, the service manual x-7525, on page 1-24, figure 38, shows the roof
rib structure. No dimensions are given, but, you can see what is up there.
Somewhere, there exists actual scale drawings with dimensions for both the
26 and 23 foot coaches. I just don't have them in my posession. Someone out
there has them.
Jim Hupy
Salem, Or
78 GMC ROYALE 403

> Reading between the lines: Are you saying the roof structure differs year
> to year and model to model? I thought the models were more paint schemes
> rather than floorplans or structural differences.
>
> On Sat, Sep 30, 2017 at 1:27 PM, Jim Kanomata

>
> > Ken,
> > He has a Royal, so that is his concern.
> > On my Kingsly , we had to fab a outter trim on the inside to fill the gap
> > around the indent.
> >

> >
> > > 1978 GMCs came with a large Hammond vent from the factory. Also the
> bath
> > > module fiberglass was made especially for the large vent. Measuring
> one
> > > outside on the roof or from the inside or the top might help locate
> where
> > > exactly to mount yours.
> > > --
> > > Ken Burton - N9KB
> > > 76 Palm Beach
> > > Hebron, Indiana
> > >
> > > _______________________________________________
> > > GMCnet mailing list
> > > Unsubscribe or Change List Options:
> > > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> > >
> >
> >
> >
> > --
> > Jim Kanomata
> > Applied/GMC, Newark,CA
> > jimk
> > http://www.appliedgmc.com
> > 1-800-752-7502
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> >
>
>
>
> --
>
> *John Phillips*
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
 
John,

Google "GMC Motorhome Blueprints."

When the results pop up click on "Images."

Regards,
Rob M.
The Pedantic Mechanic
Sydney, Australia
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
USA '77 Kingsley - TZE 267V100808

-----Original Message-----
From: Gmclist [mailto:gmclist-bounces] On Behalf Of John Phillips
Sent: Saturday, September 30, 2017 4:25 PM
To: gmclist
Subject: Re: [GMCnet] Installing large vent fan in bathroom of a Royale?

Reading between the lines: Are you saying the roof structure differs year
to year and model to model? I thought the models were more paint schemes
rather than floorplans or structural differences.

*John Phillips*
 
Location of the bathroom on a coachman differs from the ones GM did.

On Sat, Sep 30, 2017 at 3:13 PM, Rob Mueller
wrote:

> John,
>
> Google "GMC Motorhome Blueprints."
>
> When the results pop up click on "Images."
>
> Regards,
> Rob M.
> The Pedantic Mechanic
> Sydney, Australia
> AUS '75 Avion - The Blue Streak TZE365V100428
> USA '75 Avion - Double Trouble TZE365V100426
> USA '77 Kingsley - TZE 267V100808
>
> -----Original Message-----
> From: Gmclist [mailto:gmclist-bounces] On Behalf Of John
> Phillips
> Sent: Saturday, September 30, 2017 4:25 PM
> To: gmclist
> Subject: Re: [GMCnet] Installing large vent fan in bathroom of a Royale?
>
> Reading between the lines: Are you saying the roof structure differs year
> to year and model to model? I thought the models were more paint schemes
> rather than floorplans or structural differences.
>
> *John Phillips*
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

--
Jim Kanomata
Applied/GMC, Newark,CA
jimk
http://www.appliedgmc.com
1-800-752-7502
 
Jim,

The images do not show the location of the bathroom, they show the location of the bulkheads / longerons / stringers.

Regards,
Rob M.
The Pedantic Mechanic
Sydney, Australia
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
USA '77 Kingsley - TZE 267V100808


-----Original Message-----
From: Gmclist [mailto:gmclist-bounces] On Behalf Of Jim Kanomata
Sent: Saturday, September 30, 2017 6:07 PM
To: gmclist
Subject: Re: [GMCnet] Installing large vent fan in bathroom of a Royale?

Location of the bathroom on a coachman differs from the ones GM did.

Jim Kanomata
Applied/GMC, Newark,CA
jimk
http://www.appliedgmc.com
 
Thanks for the info! That will help move me forward.

I'll look up the blueprints and go from there.

Aaron
--
78 Royale, rear dinette
 
Aaron, out of curiosity, are you doing this to vent the bathroom, or just to put the vent fan in the quietest place? I guess another benefit would be
that if you left the flap open in the rain, no big deal! ;)
--
Mark Hickey
Mesa, AZ
1978 Royale Center Kitchen
 
My coach doesn't have a vent fan, except the little one in the bathroom that doesn't work.

My objectives are,

1. install large vent fan
2. Put working fan and skylight in bathroom
3. Temp control (bought a maxxair that has a thermostat)

My cats litter box stays in the shower (it's a dry bath) so my bathroom door stays open all the time.

It would work for me if I mounted it in the center of the roof - but that wouldn't take care of #2.

--
78 Royale, rear dinette
 
I don't know about the framing in the bath.
When I removed the rear vent to install my rear air conditioner there was no framing at all.
I used angle aluminum from lowes and lots of pop rivites.
A lot more work than I expected.
--
1977 Kingsley 455 as stock as it gets except lots of Ragusa parts
 
Jim B installed a maxair fan in our 78 Royale in place of the old fan. Give him a call I am sure he can give you a few tips.
--
JD Lisenby- USAF Ret
1978 Royale-455
Electromotive Tec2 FI & ignition

Navarre, FL
 
My Royale has a large fan in the side (dry) bath up above the toilet. Installation looks like it's had problems (messy sealing) but I've not had
close look at it.

Pete
--
Cary, NC

1978 Center Kitchen Royale.
 
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