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| [GMCnet] fridge fan [message #87614] |
Mon, 07 June 2010 09:05  |
Kingsley Coach
Messages: 2691
Registered: March 2009
Location: Nova Scotia Canada
Karma: -34
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Netters
If I install a fridge fan in the rear of the fridge compartment, should it
be at the bottom to push air up, or at the top to pull up the hot air for
better cooling? My guess is it is easier to push than to pull.
Opinions of fans behind the fridge are also welcomed.
Thanks
Mike in NS
--
Michael Beaton
1977 Kingsley 26-11
1977 Eleganza II 26-3
Antigonish, NS
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| Re: [GMCnet] fridge fan [message #87615 is a reply to message #87614] |
Mon, 07 June 2010 09:10  |
Steven Ferguson
Messages: 3447
Registered: May 2006
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Mike,
I used a powerful, but small, muffin fan that runs off a HF solar
panel. As soon as the sun comes up, that thing kicks in. I have it
directed upwards towards the upper end of the cooling coils. I can't
testify as to how effective it is though because I put it in with the
current fridge years ago and don't know how well the fridge works
without it.
On Mon, Jun 7, 2010 at 7:05 AM, Kingsley Coach <kingsleygmc@gmail.com> wrote:
> Netters
>
> If I install a fridge fan in the rear of the fridge compartment, should it
> be at the bottom to push air up, or at the top to pull up the hot air for
> better cooling? My guess is it is easier to push than to pull.
> Opinions of fans behind the fridge are also welcomed.
> Thanks
> Mike in NS
>
> --
> Michael Beaton
> 1977 Kingsley 26-11
> 1977 Eleganza II 26-3
> Antigonish, NS
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Steve Ferguson
'76 EII
Sierra Vista, AZ
Urethane bushing source
www.bdub.net/ferguson/
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| Re: [GMCnet] fridge fan [message #87617 is a reply to message #87615] |
Mon, 07 June 2010 09:17 |
Kingsley Coach
Messages: 2691
Registered: March 2009
Location: Nova Scotia Canada
Karma: -34
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Steve
It appears to be doing something rather well.
You said, "...I put it in with the current fridge years ago..." If you
can't remember when you put it in, it must be trouble free and helping to
cool.. <VBG>
Thanks
Mike in NS
On Mon, Jun 7, 2010 at 11:10 AM, Steven Ferguson <botiemad11@gmail.com>wrote:
> Mike,
> I used a powerful, but small, muffin fan that runs off a HF solar
> panel. As soon as the sun comes up, that thing kicks in. I have it
> directed upwards towards the upper end of the cooling coils. I can't
> testify as to how effective it is though because I put it in with the
> current fridge years ago and don't know how well the fridge works
> without it.
>
> On Mon, Jun 7, 2010 at 7:05 AM, Kingsley Coach <kingsleygmc@gmail.com>
> wrote:
> > Netters
> >
> > If I install a fridge fan in the rear of the fridge compartment, should
> it
> > be at the bottom to push air up, or at the top to pull up the hot air
> for
> > better cooling? My guess is it is easier to push than to pull.
> > Opinions of fans behind the fridge are also welcomed.
> > Thanks
> > Mike in NS
> >
> > --
> > Michael Beaton
> > 1977 Kingsley 26-11
> > 1977 Eleganza II 26-3
> > Antigonish, NS
> > _______________________________________________
> > GMCnet mailing list
> > List Information and Subscription Options:
> > http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
> >
>
>
>
> --
> Steve Ferguson
> '76 EII
> Sierra Vista, AZ
> Urethane bushing source
> www.bdub.net/ferguson/
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Michael Beaton
1977 Kingsley 26-11
1977 Eleganza II 26-3
Antigonish, NS
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| Re: [GMCnet] fridge fan [message #87620 is a reply to message #87617] |
Mon, 07 June 2010 09:31 |
Steven Ferguson
Messages: 3447
Registered: May 2006
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Mike,
I can't remember because my first replacement fridge only lasted
until one day after the warranty expired. The second one blew out the
cooling coils inside of a year, and I'm living with cooling coils
replaced under warranty. I've been screwing around with this Norcold
unit for so long I can't remember when I did the current mod. We used
to do a lot of desert camping in ridiculous high temps and the fridge
would really be flagging. I don't recall any cooling issues since the
muffin fan mod. I also can't recall exactly when I did it either.
On Mon, Jun 7, 2010 at 7:17 AM, Kingsley Coach <kingsleygmc@gmail.com> wrote:
> Steve
>
> It appears to be doing something rather well.
> You said, "...I put it in with the current fridge years ago..." If you
> can't remember when you put it in, it must be trouble free and helping to
> cool.. <VBG>
> Thks
>
> Mike in NS
>
>
> On Mon, Jun 7, 2010 at 11:10 AM, Steven Ferguson <botiemad11@gmail.com>wrote:
>
>> Mike,
>> I used a powerful, but small, muffin fan that runs off a HF solar
>> panel. As soon as the sun comes up, that thing kicks in. I have it
>> directed upwards towards the upper end of the cooling coils. I can't
>> testify as to how effective it is though because I put it in with the
>> current fridge years ago and don't know how well the fridge works
>> without it.
>>
>> On Mon, Jun 7, 2010 at 7:05 AM, Kingsley Coach <kingsleygmc@gmail.com>
>> wrote:
>> > Netters
>> >
>> > If I install a fridge fan in the rear of the fridge compartment, should
>> it
>> > be at the bottom to push air up, or at the top to pull up the hot air
>> for
>> > better cooling? My guess is it is easier to push than to pull.
>> > Opinions of fans behind the fridge are also welcomed.
>> > Thanks
>> > Mike in NS
>> >
>> > --
>> > Michael Beaton
>> > 1977 Kingsley 26-11
>> > 1977 Eleganza II 26-3
>> > Antigonish, NS
>> > _______________________________________________
>> > GMCnet mailing list
>> > List Information and Subscription Options:
>> > http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>> >
>>
>>
>>
>> --
>> Steve Ferguson
>> '76 EII
>> Sierra Vista, AZ
>> Urethane bushing source
>> www.bdub.net/ferguson/
>> _______________________________________________
>> GMCnet mailing list
>> List Information and Subscription Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>
>
>
>
> --
> Michael Beaton
> 1977 Kingsley 26-11
> 1977 Eleganza II 26-3
> Antigonish, NS
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Steve Ferguson
'76 EII
Sierra Vista, AZ
Urethane bushing source
www.bdub.net/ferguson/
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| Re: [GMCnet] fridge fan [message #87623 is a reply to message #87614] |
Mon, 07 June 2010 09:36 |
 |
USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Mike,
It would depend on the volume of air that the fan moved. A single fan above
the cooling coils would pull air up and out and help reduce the overall
temperature of the refrigerator compartment which obviously would reduce the
temperature of the coils.
However, a single fan mounted down at the bottom aimed directly at the coils
would reduce the temperature of the coils more.
For The Blue Streak I got four computer fans and mounted them in a row. They
fill the entire hot air exhaust slot in the roof.
I bought four for Double Trouble and when I pull the fridge out I'll do the
same thing.
Here's a sketch I posted a long time ago:
http://www.gmcmhphotos.com/photos/showphoto.php?photo=24197
The baffle at the bottom wasn't my idea, I read about it on the GMCnet.
Unfortunately I can't remember who published it to give credit where credit
is due.
Regards,
Rob Mueller
Sydney, Australia
AUS '75 Avion-The Blue Streak TZE365V100428
USA '75 Avion-Double Trouble TZE365V100426
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Kingsley Coach
Sent: Tuesday, 8 June 2010 12:06 AM
To: Gmclist
Subject: [GMCnet] fridge fan
Netters
If I install a fridge fan in the rear of the fridge compartment, should it
be at the bottom to push air up, or at the top to pull up the hot air for
better cooling? My guess is it is easier to push than to pull.
Opinions of fans behind the fridge are also welcomed.
Thanks
Mike in NS
--
Michael Beaton
1977 Kingsley 26-11
1977 Eleganza II 26-3
Antigonish, NS
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] fridge fan [message #87626 is a reply to message #87615] |
Mon, 07 June 2010 09:51 |
powerjon
Messages: 2446
Registered: January 2004
Karma: 5
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Senior Member |
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I agree with Steve's comments on fan placement. I have fans that are
located at the vent in the top that are thermostat control and they
work well. I was looking at some new fridges at an rv surplus place 2
weeks ago and they now have a fan that is mounted low that blow air
over the coils. I would suggest that a combination of a low and high
fan setup would work very well.
J.R. Wright
> Mike,
> I used a powerful, but small, muffin fan that runs off a HF solar
> panel. As soon as the sun comes up, that thing kicks in. I have it
> directed upwards towards the upper end of the cooling coils. I can't
> testify as to how effective it is though because I put it in with the
> current fridge years ago and don't know how well the fridge works
> without it.
>
>
>> Netters
>>
>> If I install a fridge fan in the rear of the fridge compartment,
>> should it
>> be at the bottom to push air up, or at the top to pull up the hot
>> air for
>> better cooling? My guess is it is easier to push than to pull.
>> Opinions of fans behind the fridge are also welcomed.
>> Thanks
>> Mike in NS
>>
>> --
>> Michael Beaton
>> 1977 Kingsley 26-11
>> 1977 Eleganza II 26-3
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J.R. Wright
GMC GreatLaker
GMC Eastern States
GMCMI
78 30' Buskirk Stretch
75 Avion Under Reconstruction
Michigan
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| Re: [GMCnet] fridge fan [message #87630 is a reply to message #87626] |
Mon, 07 June 2010 10:03 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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There's a simple fact that no one's mentioned: "You can't suck air" -- of
course, that should be modified with "from where you want it to come from".
In other words, while fans at the top of the refrigerator compartment will
evacuate the hot air accumulating there, that air will come from wherever it
chooses -- perhaps even down through the overhead vent. On the other hand,
you can aim the output of a fan to blow directly over the condenser coils,
where it's really needed.
But it was more convenient to mount my one at the top, like Rob's 4. :-)
Ken H.
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] fridge fan [message #87639 is a reply to message #87632] |
Mon, 07 June 2010 10:46 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Chuck,
If one did want to draw air from inside the coach, it should be at the
bottom of the refrigerator so it would pass over the condenser coils.
BUT, I doubt that it would be a good idea to go that route -- you'd
be wasting that valuable air conditioned air which many of us can't
spare. Home refrigerators work well without seriously impacting the
air conditioning because they occupy only a small percentage of the
total conditioned volume. In an RV, the refrigerator space is a much
larger percentage of the total.
Ken H.
On Mon, Jun 7, 2010 at 11:10 AM, chucklexie@juno.com
<chucklexie@juno.com> wrote:
> What about very small venting for more air from the inside the coach, possibly between the ceiling and wall that the Ref. mounts to. That would allow the added fan to be drawn air from inside the coach...
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] fridge fan [message #87640 is a reply to message #87614] |
Mon, 07 June 2010 10:56 |
emerystora
Messages: 4442
Registered: January 2004
Karma: 13
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Senior Member |
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On Jun 7, 2010, at 8:05 AM, Kingsley Coach wrote:
> Netters
>
> If I install a fridge fan in the rear of the fridge compartment, should it
> be at the bottom to push air up, or at the top to pull up the hot air for
> better cooling? My guess is it is easier to push than to pull.
> Opinions of fans behind the fridge are also welcomed.
> Thanks
> Mike in NS
>
> --
> Michael Beaton
>
Hi Mike
Here is something that I had posted back in 2005:
> I have had a couple of 4" muffin type high volume fans mounted in the top refrigerator vent for a few years now. I have mounted a mini single pole, double throw center off switch on the face of the refrigerator panel which has a diode across the outer two terminals. One fan is attached to each of the outer terminals. The 12 volt source goes to the center terminal. When switched to one side the power flows to one fan and when switch to the other side power flows to both fans. Depending on the outside temperature I can choose to have them off or one or two fans running. This really helps the refrigerator in hot weather. I did this after visiting my son in Phoenix in the summer where I found we couldn't get the refrigerator much under 50 deg. After putting in the fans, the next year we were able to maintain between 35 and 45 deg. even with 120 deg in the shade outside temps.
>
> Prior to doing this I had a small muffin fan located at the lower end of the coils, blowing up. This did not prove to work very well. Pulling the air out the top seems to work much better than trying to push it up.
Emery Stora
77 Kingsley
Santa Fe, NM
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| Re: [GMCnet] fridge fan [message #87642 is a reply to message #87614] |
Mon, 07 June 2010 11:01 |
chucklexie
Messages: 44
Registered: June 2010
Karma: 0
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Ken,
All true. I had done what I described in my GM Greyhound convert in the past, however I did add an on/off switch for the fan inside the coach. I was blowing air from inside the coach over the coils and out the outside vent/cover. That way I only ran it when it seem like a good idea and a computer fan does not remove a lot of air from the coach, but there again I run two roof airs so not really a problem for me. I got very tired of buying or repairing those darn Refrigerators and that did seem to solve the problem or got all my infant failures fixed.
Chuck
---------- Original Message ----------
From: Ken Henderson <hend4800@bellsouth.net>
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] fridge fan
Date: Mon, 7 Jun 2010 11:46:24 -0400
Chuck,
If one did want to draw air from inside the coach, it should be at the
bottom of the refrigerator so it would pass over the condenser coils.
BUT, I doubt that it would be a good idea to go that route -- you'd
be wasting that valuable air conditioned air which many of us can't
spare. Home refrigerators work well without seriously impacting the
air conditioning because they occupy only a small percentage of the
total conditioned volume. In an RV, the refrigerator space is a much
larger percentage of the total.
Ken H.
On Mon, Jun 7, 2010 at 11:10 AM, chucklexie@juno.com
<chucklexie@juno.com> wrote:
> What about very small venting for more air from the inside the coach, possibly between the ceiling and wall that the Ref. mounts to. That would allow the added fan to be drawn air from inside the coach...
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| Re: [GMCnet] fridge fan [message #87647 is a reply to message #87614] |
Mon, 07 June 2010 11:08 |
chucklexie
Messages: 44
Registered: June 2010
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I just realized some Reffigerator's have the coils below, and some on the back. :-)). My past experience with with coils on the back. That does make a difference on fan location.
Chuck
---------- Original Message ----------
From: Ken Henderson <hend4800@bellsouth.net>
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] fridge fan
Date: Mon, 7 Jun 2010 11:46:24 -0400
Chuck,
If one did want to draw air from inside the coach, it should be at the
bottom of the refrigerator so it would pass over the condenser coils.
BUT, I doubt that it would be a good idea to go that route -- you'd
be wasting that valuable air conditioned air which many of us can't
spare. Home refrigerators work well without seriously impacting the
air conditioning because they occupy only a small percentage of the
total conditioned volume. In an RV, the refrigerator space is a much
larger percentage of the total.
Ken H.
On Mon, Jun 7, 2010 at 11:10 AM, chucklexie@juno.com
<chucklexie@juno.com> wrote:
> What about very small venting for more air from the inside the coach, possibly between the ceiling and wall that the Ref. mounts to. That would allow the added fan to be drawn air from inside the coach...
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