Go Back   iRV2 Forums > THE OWNER'S CORNER FORUMS > Alpine Coach Owner's Forum
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
 
Thread Tools Search this Thread Display Modes
 
Old 05-24-2006, 11:40 AM   #1
Senior Member
 
Rick M's Avatar
 
Join Date: Jan 2006
Location: Where the Redwoods meet the Sea
Posts: 103
Hi All

I was curious as to which is the quietest & most efficient Roof Air conditioner unit.
The compressors of the A/Cs on my new 36MDDS seem loud = Dometic Duo-Therm 15k
They also don't cool the coach more than about 10 degrees!?! - My basement A/C in my Winnie was much more efficient - making it almost like a refrigerator in the coach.
Maybe someone might know if they can be 'tuned' to make them quieter?
Or maybe I should purchase an quieter A/C - if available?

Thanks for Any Input
Rick
__________________

__________________
Rick M is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 05-24-2006, 11:40 AM   #2
Senior Member
 
Rick M's Avatar
 
Join Date: Jan 2006
Location: Where the Redwoods meet the Sea
Posts: 103
Hi All

I was curious as to which is the quietest & most efficient Roof Air conditioner unit.
The compressors of the A/Cs on my new 36MDDS seem loud = Dometic Duo-Therm 15k
They also don't cool the coach more than about 10 degrees!?! - My basement A/C in my Winnie was much more efficient - making it almost like a refrigerator in the coach.
Maybe someone might know if they can be 'tuned' to make them quieter?
Or maybe I should purchase an quieter A/C - if available?

Thanks for Any Input
Rick
__________________

__________________
Rick M is offline   Reply With Quote
Old 05-24-2006, 12:06 PM   #3
Senior Member
 
Jim A's Avatar
 
Join Date: Jun 2005
Posts: 1,376
I can't answer your question about the noise level of the air conditioner, but as for the cooling level, you might want to review a thread started in July 2005 titled "FYI/Airconditioning". You might not be getting all the cool air going through the ducts to the vents. Taping it up made a big difference in mine.
__________________
Jim A
'04 Alpine Coach 36' MDDS
Jim A is offline   Reply With Quote
Old 05-24-2006, 01:23 PM   #4
Senior Member
 
Join Date: Jun 2005
Location: Abington, PA
Posts: 1,103
I have never found our A/C's particularly noisy, but as far as cooling (and I like it cool) I have the two 15BTU units and I don't believe we have ever had the two running at the same time. I know with both units running we could truly turn the refrigerator off. Something and it may be your ductwork leaking as suggested by Jim A.

Ted & Carol
2005 Alpine 2005 34' FDDS
2006 PT Cruiser GT
__________________
Ted & Carol Ulmer
2005 Alpine 34', 34FDDS
2006 PT Turbo pusher
Ted III is offline   Reply With Quote
Old 05-25-2006, 05:02 PM   #5
Senior Member
 
Old Scout's Avatar
 
Join Date: Nov 2005
Posts: 3,939
My two cents pretty much agrees with your views--ie, a basement unit is probably quieter and perhaps more effective but they come at a price. 1) a basement unit is likely more quiet--just like your home central air unit is more quiet than window units (basically what you have with roof mounted units unless the are fully ducted--Alpines are not!). 2) your basement unit takes up valueable storage space and if it is a meatlocker in your coach--some one is paying for the electricity/diesel. Final point--in a number of coaches, the tape material that seals the units to the ceiling air ducts comes undone. The end result is that a lot of air gets recycled inside the units rather than cooling the coaches. It takes just a few minutes and some foil tape to correct this..dean
__________________
Old Scout
2003 40' MDTS
Garden Ridge, Texas
Old Scout is online now   Reply With Quote
Old 05-25-2006, 05:10 PM   #6
Senior Member
 
Join Date: Jun 2005
Location: Abington, PA
Posts: 1,103
Dean & Jan, I don't know what you refer to as fully ducted with roof airs in the Alpine coaches. As far as I am concerned the Alpine I have is fully ducted in the ceiling. Possibly you have another definition?

Ted & Carol
2005 Alpine 2005 34' FDDS
2006 PT Cruiser GT
__________________
Ted & Carol Ulmer
2005 Alpine 34', 34FDDS
2006 PT Turbo pusher
Ted III is offline   Reply With Quote
Old 05-26-2006, 05:15 AM   #7
Senior Member
 
Join Date: Jan 2004
Location: Summer Rowlett TX (Why?)/Winter Palm Springs CA Two Springs RV Resort http://www.twospringsrv.com/
Posts: 521
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">I was curious as to which is the quietest & most efficient Roof Air conditioner unit.
The compressors of the A/Cs on my new 36MDDS seem loud = Dometic Duo-Therm 15k </div></BLOCKQUOTE>

I guess the noise level is typical of all roof mounted air conditioners. We have 15K Colemans on the Apex and the noise level is about the same as the Dometics on our previous Alpines.
__________________
Basil & Sue Shannon
Former Apex owner (Gary & Renee have it now)
Was Traveling Circus (2 clowns/Sage the Wonder Dog) Tent rotted. Circus folded.
Basil Shannon is offline   Reply With Quote
Old 05-26-2006, 07:00 AM   #8
Junior Member
 
Tom Viren's Avatar
 
Join Date: Mar 2006
Location: Los Angeles County
Posts: 18
Hi Dean
The reference to ducting in the Alpine coach I believe refers to the fact that it is a continuous tunnel through the 6" foam cealing and not metal duct work. The loss of cooling from the loose tape refers to the connection between the roof mounted AC and the cealing ducting. You will have to go up on the coach, take off the AC cover and check that connection. If it is torn or comming off re-tape it with aluminum duct tape available at most AC installers.
__________________
http://www.irv2.com/photopost/data/500/motorhome_edited-2.jpg

Tom & Debbie Viren
Tom Viren is offline   Reply With Quote
Old 05-26-2006, 11:35 AM   #9
Senior Member
 
Old Scout's Avatar
 
Join Date: Nov 2005
Posts: 3,939
Ted--as indicated in responses above, there has been a lot of discussion in the forum about the roof-top A/C units. Taping the ducts is actually easy--take the plastic cover off the bottom of the unit INSIDE the coach and remove the metal duct cover (6 screws). If the original duct tape has come loose--the problem will be obvious. As for the term "fully ducted," some products like Dutch Star I believe, have separate duct work for both cool air output and warm air return. As a result, the roof AC unit is sealed off somewhat from inside the coach so unit noise is muted thru the duct work. Downside is that any leaks or condensation can end up trapped in the duct/roof.
So Basil, where you guys be? dean
__________________
Old Scout
2003 40' MDTS
Garden Ridge, Texas
Old Scout is online now   Reply With Quote
Old 05-26-2006, 02:53 PM   #10
Senior Member
 
Join Date: May 2004
Location: Auburn, CA, Havasu, AZ & Mulege, BCS
Posts: 5,217
AC noise is highly subjective as it is really two things. First is the actual decibel output of the unit as you can hear it inside the parts of the coach. Second is our response. I've heard how the bedroom AC noise is "no problem" cuz "I take my hearing aids out at night." I've also heard from Winnie & Alfa owners elsewhere that the location of the basement unit near their bed is a bigger nuisance than they can stand and they want roof units on their next coach.

As Dean pointed out, some other coaches have return ducts that obscure the fans & compressor from direct line-of-sight projection of noise into the coach, that we have with the return grill that sets below the operating parts. The return duct design is quieter.

There is a device that goes over the grill & projects about 2" or so down into the coach that obscures the line-of-sight noise. I have seen it advertised in the back of FMCA magazine. I'm working on a design of something similar for the bedroom AC where headroom isn't so critical to me.
__________________
Baja-tested '08 2-slide 36'
Alpine: The Ultimate DIY'er Project
EngineerMike is offline   Reply With Quote
Old 05-28-2006, 07:14 PM   #11
Junior Member
 
Join Date: Oct 2005
Location: Phoenix, AZ
Posts: 29
For the A/C question, Ed and I turn on the rear A/C when we are up in front of the coach, and when we are sleeping, if A/C is needed, we turn on the front unit. This takes care of the noise issue. Worth a try.
__________________
E & D Wilson is offline   Reply With Quote
Old 05-29-2006, 03:41 AM   #12
Senior Member
 
Wayne R's Avatar
 
Join Date: May 2003
Location: Winter Haven Brownsville, TX
Posts: 1,138
Closing one of the privacy doors when only using one AC makes a huge difference in noise level.
__________________
Wayne & Kathy
05 Alpine 40FDQS #75330 Towing 24' car hauler, 2012 Spyder, 2003 Harley FatBoy
Wayne R is offline   Reply With Quote
Old 05-29-2006, 11:15 AM   #13
Senior Member
 
Barbaraok's Avatar
 
Alpine Owners Club
Join Date: Sep 2005
Location: Traveling in North America
Posts: 1,445
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by E & D Wilson:
For the A/C question, Ed and I turn on the rear A/C when we are up in front of the coach, and when we are sleeping, if A/C is needed, we turn on the front unit. This takes care of the noise issue. Worth a try. </div></BLOCKQUOTE>

That's also what we do. Seems to work well for us.
__________________
Barbara & David O'Keeffe
Figment II (Alpine 2002 36 MDDS)
On The Road since 2006
Blog
Barbaraok is offline   Reply With Quote
Old 05-29-2006, 07:58 PM   #14
Senior Member
 
Rick M's Avatar
 
Join Date: Jan 2006
Location: Where the Redwoods meet the Sea
Posts: 103
Thanks All for your input

After asking around, I talked with a tech. with 35 years experience repairing RVs.
His opinion was what I had for a hunch.
The originator of Air Conditioning = Carrier was the quietest.

I will attempt to do some of the 'fixes' recomended here - thanks!

So many problems debugging a new coach

Some of the things I have found wrong with my new Alpine make me wonder if a WRV will be my next coach

Rick
__________________

__________________
Rick M is offline   Reply With Quote
Reply



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
American Coach owners BudtheDiplomat Fleetwood Products Owner's Forum 4 08-19-2008 07:00 PM
Newer Coach Owners, Our Coach-Net from WRV IS NOT VALID!!! dgerstel Alpine Coach Owner's Forum 8 04-19-2008 11:52 AM
Coach House Owners Forum JohnRN New Rig Show-Off! 4 01-17-2008 03:38 PM
Any American Coach owners here? Gary RVRoamer Fleetwood Products Owner's Forum 19 01-16-2007 06:28 PM
Transmission question & Owners Manual question supercub Workhorse and Chevrolet Chassis Motorhome Forum 6 12-18-2005 07:00 AM

» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 08:05 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.