RV.Net Open Roads Forum: how long to lower temps When living quarters at 100

RV Blog

  |  

RV Sales

  |  

Campgrounds

  |  

RV Parks

  |  

RV Club

  |  

RV Buyers Guide

  |  

Roadside Assistance

  |  

Extended Service Plan

  |  

RV Travel Assistance

  |  

RV Credit Card

  |  

RV Loans

Open Roads Forum Already a member? Login here.   If not, Register Today!  |  Help

Newest  |  Active  |  Popular  |  RVing FAQ Forum Rules  |  Forum Posting Help and Support  |  Contact  

Search:   Advanced Search

Search only in Tech Issues

Open Roads Forum  >  Tech Issues

 > how long to lower temps When living quarters at 100

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 4  
Next
Sponsored By:
mrad

Prineton, MN

Senior Member

Joined: 08/23/2007

View Profile


Offline
Posted: 06/04/21 07:55pm Link  |  Quote  |  Print  |  Notify Moderator

We did a two hour pool today in 90 to 97° weather. When we got to our destinations the interior of the fifth wheel was pretty much 100° all over according to my infrared heat gun. After two hours it only dropped a couple of degrees. I have two 15,000 BTU air conditioners. One in the bedroom, one in the garage of the toy hauler. At first I had the turbo cool closed so it was using the ducts. But after having a little success cooling it down. I open the turbo cool in both the bedroom in the garage hoping to cool them down and pull the heat out of the walls and then try to cool down the living room dining room area later this evening when it cools down.

Just wondering if this is normal for two 15,000 BTU air conditioners in a 43 foot unit, or if there might be something wrong with the units

wildtoad

Blythewood, SC

Senior Member

Joined: 06/05/2011

View Profile



Good Sam RV Club Member


Posted: 06/04/21 08:07pm Link  |  Quote  |  Print  |  Notify Moderator

It will take a long time to cool the inside of an RV if the inside temp is that hot especially since the outside temp is still hot and working against the ac units. Measure the air temp at the return side of the unit versus the output side. If the return temp is say 95, and the output side is 75ish then the units are doing all they can do. Not sure where you are, but find some shade!


Tom Wilds
Blythewood, SC
2016 Newmar Baystar Sport 3004
2015 Jeep Wrangler 2dr HT

pianotuna

Regina, SK, Canada

Senior Member

Joined: 12/18/2004

View Profile


Offline
Posted: 06/04/21 08:10pm Link  |  Quote  |  Print  |  Notify Moderator

Hi,

It generally takes a long long time. Consider starting the generator, and running the roof air for an hour before you stop for the day.


Regards, Don
My ride is a 28 foot Class C, 256 watts solar, soon to have SiO2 batteries, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.

Old-Biscuit

Verde Valley

Senior Member

Joined: 06/20/2009

View Profile



Posted: 06/04/21 08:11pm Link  |  Quote  |  Print  |  Notify Moderator

Heat soak.....
Walls, floors, cabinets, ceiling, furniture etc etc

Dumping the cool air directly downward will bring temps down quicker due to the volume of cool air

THAT is why when we are traveling in HOT temps......our A/C is on via our generator
Nice to have cool 5vr when stopping for lunch and when setting up at CG


Winter travel...furnace is on


Is it time for your medication or mine?


2007 DODGE 3500 QC SRW 5.9L CTD In-Bed 'quiet gen'
2007 HitchHiker II 32.5 UKTG 2000W Xantex Inverter
US NAVY------USS Decatur DDG31

MEXICOWANDERER

las peñas, michoacan, mexico

Senior Member

Joined: 06/01/2007

View Profile


Offline
Posted: 06/04/21 08:59pm Link  |  Quote  |  Print  |  Notify Moderator

Having a veritable environmental lab's worth of recording instruments on a wall I notice that the humidity must drop before the temperature starts to move downward.
The temperature starts dropping very slowly once humidity reaches 60%. If enough BTU extraction is provided, the temp drop increases once the humidity reaches 50%.
But ceiling and wall Delta T will offset temp gain. The main. Benefit being a reduction in humidity. After I connected an 80-pint dehumidifier the cooldown was faster. But that Delta T and percentage of humidity makes simple calculations difficult.
My casita under construction is going to be firred out in 2x4 with closed cell foam. It's all shaded under a large Parrota tree.
When living in the tropics in a bare concrete dwelling life means the school of hard knocks. My bus cools down much faster at night. I parked it cross ways to the tradewinds.

time2roll

Southern California

Senior Member

Joined: 03/21/2005

View Profile



Good Sam RV Club Member


Posted: 06/04/21 09:14pm Link  |  Quote  |  Print  |  Notify Moderator

For a heat soaked RV it is common to take an extended period to cool down. I figure four+ hours after sundown before you feel a chill. Never turn the A/C off in those conditions.


2001 F150 SuperCrew
2006 Keystone Springdale 249FWBHLS
675w Solar pictures back up

Acampingwewillgo

USA

Senior Member

Joined: 11/15/2002

View Profile



Good Sam RV Club Member

Offline
Posted: 06/04/21 11:39pm Link  |  Quote  |  Print  |  Notify Moderator

One thing I've done when the sun is just plain unrelenting,where possible....spray the RV down with the hose. I know some places would frown on this but in places where they don't mind, it does help. Wet down the area around the RV too...as in gravel/dirt.


96 Vogue Prima Vista
The Kid's: Humphrie, the Mini Schnauzer and Georgie,wire haired dachshund.
Rainbow Bridge: Laddie,Scoutie,Katie,Cooper,Kodie,Rubie,Maggie, Cassie, Mollie, Elvis, Potter and Rosie Love You! (40+ years in all)

wa8yxm

Davison Michigan (East of Flint)

Senior Member

Joined: 07/04/2006

View Profile


Offline
Posted: 06/05/21 05:12am Link  |  Quote  |  Print  |  Notify Moderator

I had a 38 foot class A. My wife choose the outside color (kind of brown and green) and the two 13,500s did not stand a chance of keeping it cool. I upgraded to a pair of 15000s and still not much improvement. Just not enough cool...
I learned to "Siesta" in the afternoons.


Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times


LouLawrence

Traveling the US!

Full Member

Joined: 03/16/2021

View Profile



Posted: 06/05/21 07:31am Link  |  Quote  |  Print  |  Notify Moderator

2 A/C units for an RV of that size is going to provide minimal cooling. If a 3rd A/C unit is an option it will make a dramatic improvement if you plan to do a lot of hot weather camping. If that's not an option or you don't do that kind of heat too often then running the genset and A/C at least a few hours before arrival will help a lot. I would use the air dump option during travels and then return to ducted A/C when you are going to occupy the unit.

2oldman

NM

Senior Member

Joined: 04/15/2001

View Profile


Offline
Posted: 06/05/21 08:36am Link  |  Quote  |  Print  |  Notify Moderator

wildtoad wrote:

Measure the air temp at the return side of the unit versus the output side. If the return temp is say 95, and the output side is 75ish then the units are doing all they can do.
At 75 it will take forever. Mine's 55, constantly. I measured it.

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 4  
Next

Open Roads Forum  >  Tech Issues

 > how long to lower temps When living quarters at 100
Search:   Advanced Search

Search only in Tech Issues


New posts No new posts
Closed, new posts Closed, no new posts
Moved, new posts Moved, no new posts

Adjust text size:




© 2021 CWI, Inc. © 2021 Good Sam Enterprises, LLC. All Rights Reserved.