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06-28-2013, 06:40 AM
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#1
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Senior Member
Join Date: Apr 2013
Location: Oklahoma
Posts: 1,077
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Realistic A/C performance??
I have a 30' passport and a 13,500 btu ducted a/c unit. I've read somewhere only to expect 15-20 degrees cooler in the TT then outside, sooo if it typically hits 100-105F here in the summer, am gonna be looking at 85 to 90 degres in the TT.
I realize shade, the awning, precooling in the am will factor into how well the a/c does, but I was hoping to hear from some of you guys who have similar setups and have camped in the heat.
__________________
Kristi & Jeff
2014 Cougar 313 rli
2013 F350 king ranch
2014 passport 2650bh (sold)
2009 GMC 2500HD 6.6L 4X4 (sold)
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06-28-2013, 07:36 AM
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#2
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Senior Member
Join Date: May 2012
Location: Florence WI.
Posts: 336
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I have also found that keeping the shades closed will help somewhat in keeping the inside of the trailer cooler and more comfortable especially in bright sunlight. last year we Kept our Outback fairly comfortable in 95 degree heat. It made a differance of about 5 degrees closing the blinds. The windows are only single pane glass and have very little R-value. Also by limiting the number of times you open and close the door it will help.
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06-28-2013, 07:52 AM
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#3
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Senior Member
Join Date: Jan 2012
Location: N. Illinois
Posts: 167
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We have the same setup as you do. The temp was 105. F. When we visited the Badlands 2 years ago. We had a mostly shady site & didn't have any trouble keeping the inside comfortable. As others have stated, it helps to have your blinds closed.
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Andy & Iacie G.
2017 Impact 361
2017 F350 4x4 6.7 Powerstroke
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06-28-2013, 08:03 AM
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#4
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Site Team
Join Date: Mar 2011
Location: Gaylord
Posts: 26,995
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Way back when, we had a Holiday Rambler 34' travel trailer. It had a 15K A/C in the front and a 6K A/C in the back. When in Las Vegas in July, in Phoenix in August and in Blythe in August, the temps during the day were 110-120. We were parked in the sun and with both A/C's going "full bore" all we could do was keep the trailer a tad cooler than outside. Heaven forbid turning on a burner on the stove.
The efficiency of the units was such at at night you literally could "hang meat" in the trailer. It would easily cool into the 60's.
Nearly any RV that I've seen, with R-10 walls, R-15 ceiling and R-14 floors, single pane windows, air leaks around slides, open "holes" in the ceiling streaming in hot sunlight, and an occasional open door, the best you're going to do when sitting in the sun is to get maybe 20F below outside temps.
Try parking so the awning blocks the RV sidewall from sun, park in the shade, possibly, if you can, put a sprinkler hose on the roof to help with some evaporative cooling. But don't expect to be "calm, cool and collected at 75F in temps over 100F with a single A/C in a 30+ ft RV. You face another "issue" with trying to add a second A/C: That's the 30 Amp service. Unless you wire an additional line into the RV, say a 20Amp extension cord, or a similar type connection, you're not going to be able to run both A/C's and still maintian converter/refrigerator/interior lights.
Good luck.
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John
2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
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06-28-2013, 08:05 AM
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#5
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Senior Member
Join Date: Nov 2011
Location: SoCal
Posts: 1,739
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If I was camping where it's routinely over 100°, I'd get a bunch of window reflective material:
http://www.homedepot.com/p/Reflectix...8025/100052556
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-Scott, DW, DG, DB, and DD
2011 Passport 2590BH
2009 Ford F150 SuperCrew F X4 5.4L w/Max Tow
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06-28-2013, 09:11 AM
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#6
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Senior Member
Join Date: Apr 2013
Location: Oklahoma
Posts: 1,077
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http://www.homedepot.com/p/R-Matte-P...0#.Uc3C5owo600
I cut a couple pieces of this to fit the roof vents/skylights also. Noticed a bunch of heat comes in through those even when they are closed.
__________________
Kristi & Jeff
2014 Cougar 313 rli
2013 F350 king ranch
2014 passport 2650bh (sold)
2009 GMC 2500HD 6.6L 4X4 (sold)
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06-28-2013, 09:21 AM
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#7
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Senior Member
Join Date: May 2013
Location: Colby, KS
Posts: 104
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We are in the KS heat for harvest. We have minimal trees in the campground. As others have stated keeping doors shut and blinds closed helps but on a 100+ degree day our inside temp is mid 80's. At night we have stayed fairly comfortable. Never really been an issue when we camped for a weekend. We have not stayed any extended time in our coach before this. I can say the next coach will be 4 seasons with a larger A/C. This one works for now, but with each adventure, we learn what we like and what we don't.
Sent from my DROID RAZR using Tapatalk 2
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Trent & Jody.
2004 DRV Mobile Suites 33RS3
2016 Ford F350 DRW Lariat 6-pack 4x4 Diesel 14k GVW
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06-28-2013, 09:41 AM
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#8
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Senior Member
Join Date: Aug 2011
Location: WESTERN,CT
Posts: 2,095
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I finally gave up and put a second a/c unit on mine! i keep looking at that artic package sticker.I was hopping that since i wasn't any warmer in the cold months that maybe it saved the cold air to use in the summer. guess not dang sticker!
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BARNEY AND CHRISTINE
2010 MONTANA 3750FL
2005 DODGE 3500 DUALLY TD
2 RESCUE PUPS: SUSITNA AND CRYSTAL. RIP ALYESKA!
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06-28-2013, 03:55 PM
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#9
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Senior Member
Join Date: Jan 2011
Location: Austin, Tx
Posts: 1,910
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The 20 degree difference between inside and outside is mentioned a lot on all of the forums, and it is as incorrect as ever. The 20 degree difference is what the temperature difference should be between the discharge and return air, also called the split across the coil. Outside temperature is irrelevant except to remind you of how hot a poorly insulated and under air conditioned trailer is going to be. That 20 degree spilt is also dependent on the unit being properly charged(most are) and that you don't have cold air leaking into the ceiling. Even with everything right, 13.5 BTU is not enough AC for a 30 ft trailer in a hot climate.
There are some things you can do to improve it. There are several threads on here about sealing ducts and ceiling plenums. With everything in proper order, a failure to achieve the 20 degree split indicates that there is not enough BTUs of air conditioning for the given space
__________________
2011 Outback 277RL
2013 F250 XLT Crew Cab 6.2L
Bitter Gun Owner
Bitter Clinger
Armed Infidel
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06-28-2013, 10:36 PM
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#10
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Senior Member
Join Date: Nov 2012
Location: Fruitland
Posts: 3,357
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At the Keystone new owners workshop I went to last month they said what Bob just said and added to help further start running the A/C early in the day. Thats all they had.
__________________
2013 24RKSWE (27ft TT) Cougar 1/2 ton series SOLD 10-2021
2013 Ford F350 4x4 CC 6.7 engine, 8 ft bed, 3.55 rear end, lariat package
Retired from Oregon State Police in 2011 than worked another 9.5 years as a small town traffic cop:
As of 05-2020, I am all done with 39 years total police work. No more uniforms for me.
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06-29-2013, 03:34 AM
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#11
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Permanent User Ban
Join Date: Mar 2012
Location: Bartlesville, Oklahoma
Posts: 1,124
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RV Vent Pillow... Wont leave home without them.
Reflectix on the upper side
They work GREAT!
All RVs are different (size, number of slides, # of A/C units)... as are all camping spots (relative to shade, breeze, etc)...
But generally when the outside air temps are 90-95-nearly 100 I can maintain 72-75.... When it jumps to 100-105-108 it'll be 77-78 inside.
One of my favorite campspots has a "whole" in the sky such that late afternoon, the living room slide gets baked.
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06-29-2013, 06:40 AM
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#12
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Member
Join Date: Sep 2012
Location: Golden, Colorado
Posts: 85
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I was wondering if anyone has tried a portable AC unit that vents to the outside to supplement the main AC unit in the camper. I was thinking of running a heavy duty extension cord to the pedestal to power up the portable unit.
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Marc and Janice
Golden (home of Coors beer) Colorado
Oscar and Abby (Westies)
2012 Laredo 294RK TT "Larry"
'09 Chevy 2500HD Crewcab, 6.0L vortec (gas)
*Wishin' for a diesel*
Equal-I-Zer sway control hitch
Life is good!
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06-29-2013, 06:47 AM
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#13
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Senior Member
Join Date: Apr 2013
Location: Oklahoma
Posts: 1,077
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Sad, that's kinda what we made with the foam insulation sheets. The pillows look better though
__________________
Kristi & Jeff
2014 Cougar 313 rli
2013 F350 king ranch
2014 passport 2650bh (sold)
2009 GMC 2500HD 6.6L 4X4 (sold)
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06-29-2013, 06:50 AM
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#14
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Senior Member
Join Date: Apr 2013
Location: Oklahoma
Posts: 1,077
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It's gonna be unseasonably cool here this week 85-90 in July but I'm wishing we could just start migrating north for the summers!
__________________
Kristi & Jeff
2014 Cougar 313 rli
2013 F350 king ranch
2014 passport 2650bh (sold)
2009 GMC 2500HD 6.6L 4X4 (sold)
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06-29-2013, 07:07 AM
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#15
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Junior Member
Join Date: Jun 2013
Location: Huntington beach
Posts: 11
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Quote:
Originally Posted by Little Guy
I was wondering if anyone has tried a portable AC unit that vents to the outside to supplement the main AC unit in the camper. I was thinking of running a heavy duty extension cord to the pedestal to power up the portable unit.
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My buddy did that with his trailer. Worked as well as a two Ac deal.
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06-29-2013, 07:59 AM
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#16
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Site Team
Join Date: Mar 2009
Location: Fraser Valley BC Canada
Posts: 7,015
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We have an Uberhaus portable A/C that we use in our house on rare occasions when the temperature gets around 85+ degrees. It is rated at 8000 BTU's and would, I suspect, supplement a single A/C unit in a TT. This unit draws almost 9 amps and comes with remote. They can be obtained from most big box stores and won't break the bank. Good for small rooms and spaces.
The drawbacks as I see them are:
1) floor space would be taken up
2) needs to be vented (with fairly large hose/pipe) to the outside
3) requires a drain.
4) needs to be wired in or the use of a HD extension cord.
I suppose one could rig up a vent that wouldn't be too cumbersome, take up too much space, or get in the way.
In the long run, it might be just as easy and more convenient to have a roof-top A/C installed and make any necessary adjustments to your RV wiring to accommodate the unit.
__________________
2008 Cougar 5th Wheel 27RKS
2005 2500 GMC Duramax
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06-29-2013, 09:21 AM
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#17
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Senior Member
Join Date: May 2013
Location: Colby, KS
Posts: 104
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I think if the AC quits, I'll upgrade to a larger one if possible. When we purchased this coach we didn't plan on living in it for any extended time. One of thing we tried last night was a small tower fan. It helped move the air and made things a little more comfortable. Its cooler today @ 93 and the inside temp is 75. Not quite as cool as we keep the sticks n bricks, but not uncomfortable.
Trent
Sent from my DROID RAZR using Tapatalk 2
__________________
Trent & Jody.
2004 DRV Mobile Suites 33RS3
2016 Ford F350 DRW Lariat 6-pack 4x4 Diesel 14k GVW
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