Stus-List Re: Question re heater transom exhaust thru hull

[Graham Collins via CnC-List]

If it is mounted on the hull under the reverse transom then one wouldn't 
be able to run the unit while sailing / motoring or even anchored in any 
chop, due to the risk of submerging the outlet and choking the unit.  
Espar instructions specifically recommend mounting on the transom.


Graham Collins
Secret Plans
C 35-III #11

On 2021-05-06 9:31 a.m., Hoyt, Mike via CnC-List wrote:


Thanks Josh

That is where Persistence Engine exhaust comes out as well.  I believe 
the concern for a diesel heater exhaust is water ingress from a 
following sea so it is generally advised to have it a specific 
distance above water level.  That could work though with a high 
exhaust loop in the boat but would be a bitch to access from the 
outside for installation with the boat in the water!


Mike

*From:*Josh Muckley via CnC-List 
*Sent:* May 5, 2021 11:24 PM
*To:* Stus-List 
*Cc:* Josh Muckley 
*Subject:* Stus-List Re: Question re heater transom exhaust thru hull

Mike, I don't know if it changes anything but ALL of my discharge and 
exhaust ports come out under the reverse transom.  You can see it in 
the video linked below.


https://drive.google.com/file/d/0B8pEh5lnvP1yb1hNSENwOHRaZ1k/view?usp=drivesdk 
<https://drive.google.com/file/d/0B8pEh5lnvP1yb1hNSENwOHRaZ1k/view?usp=drivesdk>


Josh Muckley

S/V Sea Hawk

1989 C 37+

Solomons, MD

On Tue, May 4, 2021, 15:19 Hoyt, Mike via CnC-List 
mailto:cnc-list@cnc-list.com>> wrote:


Wondering if anyone on this list has installed a forced air heater
with the exhaust thru hull on a reverse transom?

The thru hull I purchased can be seen has an elbow to force the
exhaust hose into an upward loop but with a reverse transom there
is potential for water to build up at this elbow joint.

Has anyone experience with this and how it is typically resolved?

Thanks

Mike Hoyt

Persistence

Halifax NS

www.hoytsailing.com <http://www.hoytsailing.com>

Thanks to all of the subscribers that contributed to the list to
help with the costs involved. If you want to show your support to
the list - use PayPal to send contribution --
https://www.paypal.me/stumurray <https://www.paypal.me/stumurray>
Thanks - Stu


Thanks to all of the subscribers that contributed to the list to help with the 
costs involved.  If you want to show your support to the list - use PayPal to 
send contribution --   https://www.paypal.me/stumurray  Thanks - Stu
Thanks to all of the subscribers that contributed to the list to help with the 
costs involved.  If you want to show your support to the list - use PayPal to 
send contribution --   https://www.paypal.me/stumurray  Thanks - Stu

Stus-List Re: Question re heater transom exhaust thru hull

[Hoyt, Mike via CnC-List]

Hi Dennis

These are all double walled to protect the hull.  Just google heater exhaust 
thru hull or heater exhaust transom thru hull and you will find plenty of 
examples to look at.  Typical installation has approx. ¼ inch of space between 
the pipe portion that travels thru the hull and the hull itself.  On top of 
that as is standard practice the balsa is dug out in the opening and replaced 
with thickened epoxy to prevent water intrusion into the hull.

Very good question though.

FWIW this entire project presents interesting challenges all along the 
progression of installation.


  1.  Where do I locate the heater unit?
  2.  What do I mount the heater to?
  3.  How do I route the ducting to the cabin?
  4.  How do I route the exhaust?
  5.  The Chinese versions are reputed to have lesser quality exhaust 
components and no thru hull so these must be sourced and replaced.  (the fresh 
air to heat is in cockpit locker same as where exhaust components live – vs 
when installed in truck or camper)
  6.  Once all of the above is complete electrical gets looked at.  I suspect a 
boat has longer electrical runs than a camper due to location of heater in 
cockpit locker

All of this in very cramped locations inside the nether regions of a sailboat.  
If all comes together then hopefully will have a  cozy boat to overnight on 
earlier and later in the season.  Especially important when there is nothing 
else and nowhere else to go these days

Mike Hoyt
Persistence
Halifax, NS
www.hoytsailing.com


From: Dennis C. via CnC-List 
Sent: May 6, 2021 10:03 AM
To: Stus-List 
Cc: Dennis C. 
Subject: Stus-List Re: Question re heater transom exhaust thru hull


Being from the south where we're more concerned about air conditioners, I'm not 
familiar with heater exhausts at all.  If one goes through a balsa cored 
portion of the hull or deck, is there concern about heat and the balsa?  Or is 
a heater exhaust fitting designed to protect the core from excessive heat?  
Just curious.

--
Dennis C.
Touche' 35-1 #83
Mandeville, LA
Thanks to all of the subscribers that contributed to the list to help with the 
costs involved.  If you want to show your support to the list - use PayPal to 
send contribution --   https://www.paypal.me/stumurray  Thanks - Stu

Stus-List Re: Question re heater transom exhaust thru hull

[Dennis C. via CnC-List]

Being from the south where we're more concerned about air conditioners, I'm
not familiar with heater exhausts at all.  If one goes through a balsa
cored portion of the hull or deck, is there concern about heat and the
balsa?  Or is a heater exhaust fitting designed to protect the core from
excessive heat?  Just curious.

-- 
Dennis C.
Touche' 35-1 #83
Mandeville, LA
Thanks to all of the subscribers that contributed to the list to help with the 
costs involved.  If you want to show your support to the list - use PayPal to 
send contribution --   https://www.paypal.me/stumurray  Thanks - Stu

Stus-List Re: Question re heater transom exhaust thru hull

[Hoyt, Mike via CnC-List]

Thanks Josh

That is where Persistence Engine exhaust comes out as well.  I believe the 
concern for a diesel heater exhaust is water ingress from a following sea so it 
is generally advised to have it a specific distance above water level.  That 
could work though with a high exhaust loop in the boat but would be a bitch to 
access from the outside for installation with the boat in the water!

Mike

From: Josh Muckley via CnC-List 
Sent: May 5, 2021 11:24 PM
To: Stus-List 
Cc: Josh Muckley 
Subject: Stus-List Re: Question re heater transom exhaust thru hull

Mike, I don't know if it changes anything but ALL of my discharge and exhaust 
ports come out under the reverse transom.  You can see it in the video linked 
below.

https://drive.google.com/file/d/0B8pEh5lnvP1yb1hNSENwOHRaZ1k/view?usp=drivesdk

Josh Muckley
S/V Sea Hawk
1989 C 37+
Solomons, MD

On Tue, May 4, 2021, 15:19 Hoyt, Mike via CnC-List 
mailto:cnc-list@cnc-list.com>> wrote:
Wondering if anyone on this list has installed a forced air heater with the 
exhaust thru hull on a reverse transom?

The thru hull I purchased can be seen has an elbow to force the exhaust hose 
into an upward loop but with a reverse transom there is potential for water to 
build up at this elbow joint.

Has anyone experience with this and how it is typically resolved?

Thanks

Mike Hoyt
Persistence
Halifax NS
www.hoytsailing.com<http://www.hoytsailing.com>



Thanks to all of the subscribers that contributed to the list to help with the 
costs involved.  If you want to show your support to the list - use PayPal to 
send contribution --   https://www.paypal.me/stumurray  Thanks - Stu
Thanks to all of the subscribers that contributed to the list to help with the 
costs involved.  If you want to show your support to the list - use PayPal to 
send contribution --   https://www.paypal.me/stumurray  Thanks - Stu

Stus-List Re: Question re heater transom exhaust thru hull

[Josh Muckley via CnC-List]

Mike, I don't know if it changes anything but ALL of my discharge and
exhaust ports come out under the reverse transom.  You can see it in the
video linked below.

https://drive.google.com/file/d/0B8pEh5lnvP1yb1hNSENwOHRaZ1k/view?usp=drivesdk

Josh Muckley
S/V Sea Hawk
1989 C 37+
Solomons, MD

On Tue, May 4, 2021, 15:19 Hoyt, Mike via CnC-List 
wrote:

> Wondering if anyone on this list has installed a forced air heater with
> the exhaust thru hull on a reverse transom?
>
>
>
> The thru hull I purchased can be seen has an elbow to force the exhaust
> hose into an upward loop but with a reverse transom there is potential for
> water to build up at this elbow joint.
>
>
>
> Has anyone experience with this and how it is typically resolved?
>
>
>
> Thanks
>
>
>
> Mike Hoyt
>
> Persistence
>
> Halifax NS
>
> www.hoytsailing.com
>
>
>
>
>
>
> Thanks to all of the subscribers that contributed to the list to help with
> the costs involved.  If you want to show your support to the list - use
> PayPal to send contribution --   https://www.paypal.me/stumurray  Thanks
> - Stu
Thanks to all of the subscribers that contributed to the list to help with the 
costs involved.  If you want to show your support to the list - use PayPal to 
send contribution --   https://www.paypal.me/stumurray  Thanks - Stu

Stus-List Re: Question re heater transom exhaust thru hull

[Jim Watts via CnC-List]

A picture is the easiest way to show how mine is installed. I didn't do the
work, so I don't know if that ovalized trim ring is standard.

https://lh3.googleusercontent.com/pw/ACtC-3dOGxyHGeiFDqOIEGkz5-tkRcjJ-PBQkJ-sXT-N76L8uiaKwQmYEFbODh1tUwmi_0ZPutRsUE4uf6BTNR3zN6yoJbSOhsUeOkzTA7PaFsXE9tCh6ZmUnd_bfcMWAVPka5CbP7x6ga9jDAEq9NNLB4eR=w1444-h929-no?authuser=0

Jim Watts
Paradigm Shift
C 35 Mk III
Victoria, BC


On Tue, 4 May 2021 at 12:19, Hoyt, Mike via CnC-List 
wrote:

> Wondering if anyone on this list has installed a forced air heater with
> the exhaust thru hull on a reverse transom?
>
>
>
> The thru hull I purchased can be seen has an elbow to force the exhaust
> hose into an upward loop but with a reverse transom there is potential for
> water to build up at this elbow joint.
>
>
>
> Has anyone experience with this and how it is typically resolved?
>
>
>
> Thanks
>
>
>
> Mike Hoyt
>
> Persistence
>
> Halifax NS
>
> www.hoytsailing.com
>
>
>
>
>
>
> Thanks to all of the subscribers that contributed to the list to help with
> the costs involved.  If you want to show your support to the list - use
> PayPal to send contribution --   https://www.paypal.me/stumurray  Thanks
> - Stu
Thanks to all of the subscribers that contributed to the list to help with the 
costs involved.  If you want to show your support to the list - use PayPal to 
send contribution --   https://www.paypal.me/stumurray  Thanks - Stu

Stus-List Re: Question re heater transom exhaust thru hull

[Hoyt, Mike via CnC-List]

Thank you Graham

I just found a similar one on ebay 
https://www.ebay.com/itm/194046570203?hash=item2d2e13aedb:g:2J0AAOSw22FfpZ7f 
which comes to $83 CAD.  I ordered it.  Anyone want a spare 24mm Wabasto 
Eberspacher 24mm exhaust thru-hull?  I will now have an extra one.

On this page http://www.hoytsailing.com/baddeck_regatta_week_2015.htm if you 
look at second photo from bottom you can see why it would not work on the side 
of the hull.  The angled thru hull that Graham suggested resolves my problem 
properly.

Gotta love this list!

Mike

From: Graham Collins via CnC-List 
Sent: May 4, 2021 7:45 PM
To: Hoyt, Mike via CnC-List 
Cc: Graham Collins 
Subject: Stus-List Re: Question re heater transom exhaust thru hull


Hi Mike!  Haven't seen you in over a year, hope all is well.

Secret Plans has an Espar with the exhaust out the transom, it is angled 
sufficiently that I have absolutely no concerns about drainage, it has worked 
flawlessly since 2010.  I've got it tucked up high as I could and still get a 
12" upward hump in the exhaust hose (and maintain clearance from the hull).  
Boat is at BBYC on the hard for another 10 days if you want a look, you've got 
my OK to climb up.  Don't steal the rum.

My fitting doesn't have an elbow, it is welded up on an angle.  Like this one:  
https://www.nwmarineair.com/thru-hull-fitting-angled/

best,

Graham Collins

Secret Plans

C 35-III #11
On 2021-05-04 4:18 p.m., Hoyt, Mike via CnC-List wrote:
Wondering if anyone on this list has installed a forced air heater with the 
exhaust thru hull on a reverse transom?

The thru hull I purchased can be seen has an elbow to force the exhaust hose 
into an upward loop but with a reverse transom there is potential for water to 
build up at this elbow joint.

Has anyone experience with this and how it is typically resolved?

Thanks

Mike Hoyt
Persistence
Halifax NS
www.hoytsailing.com<http://www.hoytsailing.com>






Thanks to all of the subscribers that contributed to the list to help with the 
costs involved.  If you want to show your support to the list - use PayPal to 
send contribution --   https://www.paypal.me/stumurray  Thanks - Stu
Thanks to all of the subscribers that contributed to the list to help with the 
costs involved.  If you want to show your support to the list - use PayPal to 
send contribution --   https://www.paypal.me/stumurray  Thanks - Stu

Stus-List Re: Question re heater transom exhaust thru hull

[Graham Collins via CnC-List]

Hi Mike!  Haven't seen you in over a year, hope all is well.

Secret Plans has an Espar with the exhaust out the transom, it is angled 
sufficiently that I have absolutely no concerns about drainage, it has 
worked flawlessly since 2010.  I've got it tucked up high as I could and 
still get a 12" upward hump in the exhaust hose (and maintain clearance 
from the hull).  Boat is at BBYC on the hard for another 10 days if you 
want a look, you've got my OK to climb up.  Don't steal the rum.


My fitting doesn't have an elbow, it is welded up on an angle. Like this 
one: https://www.nwmarineair.com/thru-hull-fitting-angled/ 



best,

Graham Collins
Secret Plans
C 35-III #11

On 2021-05-04 4:18 p.m., Hoyt, Mike via CnC-List wrote:


Wondering if anyone on this list has installed a forced air heater 
with the exhaust thru hull on a reverse transom?


The thru hull I purchased can be seen has an elbow to force the 
exhaust hose into an upward loop but with a reverse transom there is 
potential for water to build up at this elbow joint.


Has anyone experience with this and how it is typically resolved?

Thanks

Mike Hoyt

Persistence

Halifax NS

www.hoytsailing.com


Thanks to all of the subscribers that contributed to the list to help with the 
costs involved.  If you want to show your support to the list - use PayPal to 
send contribution --   https://www.paypal.me/stumurray  Thanks - Stu
Thanks to all of the subscribers that contributed to the list to help with the 
costs involved.  If you want to show your support to the list - use PayPal to 
send contribution --   https://www.paypal.me/stumurray  Thanks - Stu

Stus-List Re: Question re heater transom exhaust thru hull

[Shawn Wright via CnC-List]

Our 35-2 has a modest reverse transom, and the through-hull I got would
have just allowed for drainage, but I decided to put on the aft quarter,
about 12" forward of the transom edge. The heater is just below the deck,
so it's all downhill to the outlet, and I've had no issues so far. Many
newer boats (Dufour, Beneteau, Island Packet) use a similar location also,
so I figured it's probably ok.

--
Shawn Wright
shawngwri...@gmail.com
S/V Callisto, 1974 C 35
https://www.facebook.com/SVCallisto


On Tue, May 4, 2021 at 1:37 PM Ken Heaton via CnC-List <
cnc-list@cnc-list.com> wrote:

> We have a reverse transom too but our Espar exhaust doesn't go through the
> transom. It goes through the side of the hull back close to the transom.
>
> Ken H.
>
> On Tue, 4 May 2021 at 16:19, Hoyt, Mike via CnC-List <
> cnc-list@cnc-list.com> wrote:
>
>> Wondering if anyone on this list has installed a forced air heater with
>> the exhaust thru hull on a reverse transom?
>>
>>
>>
>> The thru hull I purchased can be seen has an elbow to force the exhaust
>> hose into an upward loop but with a reverse transom there is potential for
>> water to build up at this elbow joint.
>>
>>
>>
>> Has anyone experience with this and how it is typically resolved?
>>
>>
>>
>> Thanks
>>
>>
>>
>> Mike Hoyt
>>
>> Persistence
>>
>> Halifax NS
>>
>> www.hoytsailing.com
>>
>>
>>
>>
>>
>>
>> Thanks to all of the subscribers that contributed to the list to help
>> with the costs involved.  If you want to show your support to the list -
>> use PayPal to send contribution --   https://www.paypal.me/stumurray
>> Thanks - Stu
>
> Thanks to all of the subscribers that contributed to the list to help with
> the costs involved.  If you want to show your support to the list - use
> PayPal to send contribution --   https://www.paypal.me/stumurray  Thanks
> - Stu
Thanks to all of the subscribers that contributed to the list to help with the 
costs involved.  If you want to show your support to the list - use PayPal to 
send contribution --   https://www.paypal.me/stumurray  Thanks - Stu

Stus-List Re: Question re heater transom exhaust thru hull

[Ken Heaton via CnC-List]

We have a reverse transom too but our Espar exhaust doesn't go through the
transom. It goes through the side of the hull back close to the transom.

Ken H.

On Tue, 4 May 2021 at 16:19, Hoyt, Mike via CnC-List 
wrote:

> Wondering if anyone on this list has installed a forced air heater with
> the exhaust thru hull on a reverse transom?
>
>
>
> The thru hull I purchased can be seen has an elbow to force the exhaust
> hose into an upward loop but with a reverse transom there is potential for
> water to build up at this elbow joint.
>
>
>
> Has anyone experience with this and how it is typically resolved?
>
>
>
> Thanks
>
>
>
> Mike Hoyt
>
> Persistence
>
> Halifax NS
>
> www.hoytsailing.com
>
>
>
>
>
>
> Thanks to all of the subscribers that contributed to the list to help with
> the costs involved.  If you want to show your support to the list - use
> PayPal to send contribution --   https://www.paypal.me/stumurray  Thanks
> - Stu
Thanks to all of the subscribers that contributed to the list to help with the 
costs involved.  If you want to show your support to the list - use PayPal to 
send contribution --   https://www.paypal.me/stumurray  Thanks - Stu