Reply
 
Thread Tools Search this Thread Display Modes
 
Old 11-24-2010, 03:31 PM   #15
Wise Elder
 
Jammer's Avatar
 
2010 30' Classic
Vintage Kin Owner
South of the river , Minnesota
Join Date: Dec 2009
Posts: 4,119
Exactly. The Atwood Everest is very similar to the Suburban furnace you mention.
__________________

__________________
Jammer is offline   Reply With Quote
Old 11-24-2010, 03:43 PM   #16
Rivet Master
 
Aerowood's Avatar

 
1971 21' Globetrotter
Arvada , Colorado
Join Date: May 2006
Posts: 2,841
You could put an inline fan in the duct going aft to boost the flow They are available in a couple different sizes.

yellowTAIL™ 3” Blower - SHURflo
__________________

__________________
Aerowood is offline   Reply With Quote
Old 11-24-2010, 03:53 PM   #17
tpi
Rivet Master
 
2005 25' Safari
Trabuco Canyon , California
Join Date: Apr 2006
Posts: 866
Images: 2
My sister's Scamp has the Everest Star. Its effective but I don't find it to be quiet. When I sleep my head is about 5 ft. from the heater and it tends to wake me up from the fan noise when it cycles. I don't know if this is relevant to your usage pattern or the soundness of your sleep but fwiw..

Also I had one of these small furnaces in a class B, but they ducted it. It was quieter in the ducted installation. The ducting seems to muffle the blower noise to a degree.
__________________
tpi is offline   Reply With Quote
Old 11-24-2010, 03:54 PM   #18
Wise Elder
 
Jammer's Avatar
 
2010 30' Classic
Vintage Kin Owner
South of the river , Minnesota
Join Date: Dec 2009
Posts: 4,119
Here's a place that has insulated flexible duct. It's $18 a foot though. They list 4" as the smallest size on the web site but the price list also includes 3".

http://www.ducting.com/Type_U.html
__________________
Jammer is offline   Reply With Quote
Old 11-24-2010, 04:09 PM   #19
_
 
. , .
Join Date: Dec 2004
Posts: 8,812
looking now at the bathroom vent,

it would be easy to put a T there,

add another 3 feet of duct inside the cabinetry

and another vent cover/opening in the bedroom.

then completely closing the bathroom vent

would send 2x as much warm air into the back room.

pretty much the same layout in a 31 but the 30 hvac is a bit different.

cheers
2air'
__________________
all of the true things that i am about to tell you are shameless lies. l.b.j.

we are here on earth to fart around. don't let anybody tell you any different. k.v.
2airishuman is offline   Reply With Quote
Old 11-24-2010, 04:47 PM   #20
Don't forget your cat nap
 
Ag&Au's Avatar
 
Port Orchard , Washington
Join Date: May 2009
Posts: 4,464
Images: 1
Quote:
Originally Posted by 2airishuman View Post
looking now at the bathroom vent,

it would be easy to put a T there,

add another 3 feet of duct inside the cabinetry

and another vent cover/opening in the bedroom.

then completely closing the bathroom vent

would send 2x as much warm air into the back room.

pretty much the same layout in a 31 but the 30 hvac is a bit different.

cheers
2air'
My experience is that very little heat and not much airflow makes it to the bathroom.

I like aerowood's little fan.

However with the doors open between the living room and the bedroom we are quite comfortable sleeping with adequate blankets. However we haven't been out any lower that about 25F.


Ken
__________________
Ag&Au is offline   Reply With Quote
Old 11-24-2010, 05:03 PM   #21
_
 
. , .
Join Date: Dec 2004
Posts: 8,812
Quote:
Originally Posted by w7ts View Post
My experience is that very little heat and not much airflow makes it to the bathroom...
the flow 2 my johnny is toasty...

easily the 30 degrees warmer that jammer notes above.

given the shower space is warmed via the ducts leaking and hot water,

i could get by without direct head heating, pretty easily.

the insides of these streams are very different at 20 with wind,

or when it's 10 and colder outside.

since all the bits contract (shrinkage!) every gap gets gapEEr, especially the entry door.

and a LOT of air comes in via the fridge backsides/install, the drawer underneath becomes a wine chiller.

i could tell reliably when the outside temps hit zero in the old moho...

the shower trap wasn't insulated and would freeze, filling the pan with bath water.

cheers
2air'
__________________
all of the true things that i am about to tell you are shameless lies. l.b.j.

we are here on earth to fart around. don't let anybody tell you any different. k.v.
2airishuman is offline   Reply With Quote
Old 11-24-2010, 05:24 PM   #22
Wise Elder
 
Jammer's Avatar
 
2010 30' Classic
Vintage Kin Owner
South of the river , Minnesota
Join Date: Dec 2009
Posts: 4,119
Would work but since the bathroom also lacks heat I doubt if it would help much.

[eta: crossposted with 2air] A factor to consider is that the bulkhead forward of the 'fridge is a source of heat loss since the 'fridge compartment is vented to outside. Adjoining areas, the dinette and the wall next to the head in my traylah, are cooled as a result.

Adding heat IN the bathroom might solve much of the problem but there is no room to do so in a 30' (head on streetside and shower on curbside). The places to do it are taken up by wheelwells, lav sink, and the water heater.

There may be a third possibility that we have not counted upon :-) which is that we could run an additional flexible duct back from the Atwood to the bedroom. It could replace one of the outlets into the living room area or be a fifth connection through the bottom of the furnace.
__________________
Jammer is offline   Reply With Quote
Old 11-24-2010, 06:07 PM   #23
_
 
. , .
Join Date: Dec 2004
Posts: 8,812
is there no duct near the john under the sink?

yep, floor plan matters.

and the split bath is an issue at the shower,

that' how the oldmoho was too and shower stall was like a meat locker when cold out.

on the 34 curbside is entry door/dinette/fridge and long closet with only the water pump as plumbing bits.


street side is galley and full bath and furnace and water heater and all the ducting and plumbing...

except for the 1 lame duct that passes UNDER the subfloor, along with the water pump feeds/returns.

these hvac/plumbing layouts are rubrics from another dimension.

the one redeeming factor with the basic 34 is they've been tweaking the SAME floorplan 4 a really long time.

cheers
2air'
__________________
all of the true things that i am about to tell you are shameless lies. l.b.j.

we are here on earth to fart around. don't let anybody tell you any different. k.v.
2airishuman is offline   Reply With Quote
Old 11-24-2010, 06:34 PM   #24
Wise Elder
 
Jammer's Avatar
 
2010 30' Classic
Vintage Kin Owner
South of the river , Minnesota
Join Date: Dec 2009
Posts: 4,119
The layout is:
curbside - galley sink with furnace below, range, closet, shower
streetside - cabinet, dinette, fridge, head, lav sink with water heater below

Ductwork includes
- two outlets inches away from the range facing forward across the entry door towards the gaucho
- one duct with an outlet just forward of the shower. The interior of the closet extends about 10" aft of the closet door into the bathroom area and the outlet is in the wall between the closet and the bathroom.
- one duct leading under the shower to the bedroom.

A degree of heat in the shower enclosure is provided by the duct to the bedroom.

I believe that both the bathroom and bedroom ducts have small side ducts T'ed off them with little 1.5" tendrils extending down into the tank area and the space where the water lines cross under the trailer to reach the head and lav.

Overall the floorplan is highly functional. The only thing I would change is I would make the cabinet area forward of the dinette a few inches smaller to accommodate a slightly larger dinette.
__________________
Jammer is offline   Reply With Quote
Old 11-27-2010, 11:16 AM   #25
Wise Elder
 
Jammer's Avatar
 
2010 30' Classic
Vintage Kin Owner
South of the river , Minnesota
Join Date: Dec 2009
Posts: 4,119
One of the outlets from the furnace is a smaller (1.5") duct going to the tank area. I can see that it would be possible to replace this with a larger duct going to the bedroom, and a T, so that air is still sent to the tank area. I may explore this further. I think the largest problem area is getting the duct across the water pump area below the closet floor, since that space is now somewhat crowded with the addition of the wall can for the electric heat.
__________________
Jammer is offline   Reply With Quote
Old 11-27-2010, 12:11 PM   #26
Rivet Master
 
Gene's Avatar
 
2008 25' Safari FB SE
Grand Junction , Colorado
Join Date: Sep 2007
Posts: 10,842
Adjustable registers are available. They come in several colors that may better match the interior of your Airstream. They turn to direct flow just like the OEM registers, but also can be opened and closed. They are not of particularly high quality, but neither are the OEM ones. They are made by the same manufacturer. I think the ones with the adjustable flow are a dollar or two more than the OEM ones.

I replaced 3 of the factory ones with ones made for Winnebagos because of the better color match and the ability to adjust air flow. Unlike Jammer, we want the bedroom to be cooler, so I just shut off the bedroom. I did not notice any significant increase in air flow from the other registers, but if there's a T off to the tanks, maybe the bedroom air is going there, not a bad thing.

You could close down the living area registers part way to increase flow to the bedroom. I don't know whether shutting down one register will negatively affect the furnace. If there are T's from the bedroom and bathroom ducts, it may be a small change.

Our thermostat is in the bedroom so when the bedroom is cool, the rest of the trailer can get too warm. I would prefer the thermostat to be in the living area.

I believe this is the vendor where I got the registers: Winnebago Parts - Official Winnebago Parts and Accessories Catalog

Gene
__________________
Gene is offline   Reply With Quote
Old 12-08-2010, 03:01 PM   #27
Wise Elder
 
Jammer's Avatar
 
2010 30' Classic
Vintage Kin Owner
South of the river , Minnesota
Join Date: Dec 2009
Posts: 4,119
Looks like the furnace ducts are 4" (not 3" as I stated upthread).

There are cheaper sources for ductwork. Amazon has a couple of grades. Here's the better one, at $3 a foot:

Amazon.com: M-Kc Thermaflex Flexible Hvac Duct - 4 Inch Diameter R4.2: Home Improvement

I'm thinking I may try using some of that. It should help with both the noise and the heat distribution.
__________________
Jammer is offline   Reply With Quote
Old 12-08-2010, 03:24 PM   #28
Wise Elder
 
Jammer's Avatar
 
2010 30' Classic
Vintage Kin Owner
South of the river , Minnesota
Join Date: Dec 2009
Posts: 4,119
I note that the static pressure specification is 0.1" WC at the duct and .25" in the casing.

Atwood recommends flexible duct have a temperature rating of 250 degrees continuous, for short ducts less than 9" in length (the galley ducts would be in this category), and 200 degrees continuous for longer runs. However, the high limit is set at 190 degrees.
__________________

__________________
Jammer is offline   Reply With Quote
Reply

Tags
furnace tuning


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Using the heat pump/heat strip instead of furnace. crazylev On The Road... 38 10-28-2016 08:58 PM
New AC, Heat Pump or Heat strip? firedog 1990 - 1993 Excella 3 01-22-2010 05:23 PM
The Heat is ON!! GlenCoombe Mechanics Corner - Engines, Transmission & More... 5 10-09-2005 04:48 PM
Odd back-to-back eBay auctions .... summerkid Trailer Values 5 09-12-2005 01:34 PM
need heat whistler Furnaces, Heaters, Fireplaces & Air Conditioning 3 06-07-2004 02:32 PM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 10:36 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.