Reply
 
Thread Tools Display Modes
Old 06-20-2016, 01:30 PM   #11
Senior Member
 
bob dirt's Avatar
 
Join Date: Jan 2016
Location: Phoenix, Arizona
Posts: 293
Quote:
Originally Posted by johnm1 View Post
Question (well, more of a statement) ... I thought A/C didn't work very well in AZ due to the dry air. Isn't that why most houses use a swamp cooler kind of thing?

I'm just asking because I don't know and I'd like to.
That's the funniest thing I have ever heard


Most houses have A/C. I have made my living off of fixing them or replacing them for the last 40 years starting at 18. I happen to have 2 a/c units on my house AND an evaporative cooler. The evap works great until the dew point hits around 50 degrees or the ambient temp hits 110*. Yesterday it was 118-120 where I live in north Phoenix. It wasn't that bad. I did yard work until 1:00 then decided that it WAS too hot.

I just turned my RV a/c on. I'm curious how cool it will be at 3:00. It's 107 right now with 10% humidity.

I have been in Bullhead City when it was 113* out with the a/c plugged in and it kept my toy hauler at 80* all and cooled down more at night. We were riding jet skis.
__________________

__________________
2016 Forester 2401WS MBS
Life is short...eat the cookie
bob dirt is offline   Reply With Quote
Old 06-20-2016, 01:44 PM   #12
Senior Member
 
Join Date: Sep 2010
Posts: 1,702
My A/C works better in dry air than wet air.


2010 F250 5.4L 3.73
2011 Flagstaff 831FKBSS
Equal-i-zer 4pt 12K
__________________

__________________

2011 Flagstaff 831FKBSS
2010 F250 4X4 5.4L 3.73 LS
EQUALIZER E4 1200/12000
lbrjet is offline   Reply With Quote
Old 06-20-2016, 01:56 PM   #13
Full-Timer
 
Join Date: Dec 2013
Location: Arizona
Posts: 6
119/78 - 41* difference!

Yesterday in Parker, Arizona...



RV in Full sun.
All windows covered with tight-fitting Reflectix.
Outdoor temperature sensor underneath trailer in shade.
34' open-plan toyhauler, 15,000 btu in living room, 13,500 in bedroom, fan in bedroom blowing air down hallway into living room.

Supposed to be 124F today! Will post results.
__________________

Drew & Micki V. - Full-Time Since 2001
2006 Forest River Sandpiper Sport SP34T
1982 GMC C3500 3+3 Camper Special w/modified 7.4L
1976 Holiday Rambler Presidential 3300 TT (still roadworthy... just in case)
1984 Chevy K2500 Suburban (just in case)
DesertDrew is offline   Reply With Quote
Old 06-20-2016, 02:00 PM   #14
Senior Member
 
Join Date: Sep 2015
Location: Penfield
Posts: 176
waiter21 - I learned something new today. I also figured our 13.5 (ducted) wouldn't shut off much, if ever.
__________________
John M
2013 GMC Sierra 2500DH CC, 4x4, D/A
2016 Forest River Vengeance 25V TT/TH
johnm1 is offline   Reply With Quote
Old 06-20-2016, 03:45 PM   #15
Senior Member
 
florabama's Avatar
 
Join Date: May 2016
Location: Northwest Florida
Posts: 229
Yeah, as much as I hate the eventual window fogging I'm seriously leaning toward ordering dual pain windows in my Cedar Creek.
__________________
2016 Ram 3500HD 6.7L CTD 4x4 CCSB
2017 CC 34RL2 Hathaway Edition
Andersen Ultimate 5th Wheel Hitch
Nights Camped: 2017=57 | Booked=7
florabama is offline   Reply With Quote
Old 06-20-2016, 03:49 PM   #16
Member
 
Join Date: Dec 2014
Posts: 91
Quote:
Originally Posted by johnm1 View Post
I thought A/C didn't work very well in AZ due to the dry air. Isn't that why most houses use a swamp cooler kind of thing?
An AC unit is more efficient in dry air, because it doesn't have to remove the heat from the condensing water vapor. 1 pound of water vapor gives off 970 BTUs as it condenses, and the AC unit has to take that heat away.

Swamp coolers are used in the desert because they are cheaper to buy and operate. They also increase comfort by adding humidity. Because they work by evaporating water, they are not suited to high humidity regions.
__________________
johntaylor is offline   Reply With Quote
Old 06-20-2016, 06:10 PM   #17
Senior Member
 
DouglasReid's Avatar
 
Join Date: Jun 2016
Location: Maurice, LA
Posts: 1,081
Quote:
Originally Posted by johnm1 View Post
Question (well, more of a statement) ... I thought A/C didn't work very well in AZ due to the dry air. Isn't that why most houses use a swamp cooler kind of thing?

I'm just asking because I don't know and I'd like to.
An AC unit will work just fine in a dry climate. Since they have an RV with poor insulation compared to a house a 20 degree drop is good. Better insulation would equal a better drop. It does however entail a HUGE amount of electrical energy to popwer teh compressor and fans compared to a swamp cooler.

a swamp cooler cools by evaporation of water and requires only a water source to drop down the jute pads and a fan to power a large Squirrel cage fan to pass the air into the house, etc. Not very practical for an RV though.
__________________
2012 Wildcat Sterling 32RL, Maxxis 8008s Load rating E, TST 507 TPMS w/ Flow-thru Sensors & Repeater
2008 Chevy Silverado 2500HD LTZ Diesel, Futomo Oil Drain Valve, Turbo Brake activated, 39 gal Aux Tank W/ Fuel Pump transfer
DouglasReid is offline   Reply With Quote
Old 06-20-2016, 08:57 PM   #18
Full-Timer
 
Join Date: Dec 2013
Location: Arizona
Posts: 6
Parker, AZ 125* outside - 81* inside!

Today the forecast was for 124*, it actually hit 125*!

Here is my indoor/outdoor thermometer reading...

Thermometer is at elbow level next to couch.

These are real numbers folks...
I didn't hold it next to the A/C outlet or put it in the fridge.

I have been achieving similar numbers here in the Arizona desert for the last 15 years, last 2 summers in the SP34T toyhauler (pictured in sig) that we have now, the previous 9 years in a 1976 Holiday Rambler Presidential 3300 TT (30' w/ single 15,000 btu), and the first 4 years in a 1972 24' Dodge class A w/ single 15,000 btu A/C.

Turn your RV into a cave, put tight-fitting Reflectix reflective insulation in all windows, vents and skylights. Keep A/C(s) set at 80% or less to avoid freezing up. Use a fan to circulate cool air better. Don't cook or take hot showers during the day. Avoid going in and out during day.

The heat can be tolerable in almost any rig. I have helped many others get their RV more comfortable for summer camping using these methods.

Stay cool,
Desert Drew
__________________

Drew & Micki V. - Full-Time Since 2001
2006 Forest River Sandpiper Sport SP34T
1982 GMC C3500 3+3 Camper Special w/modified 7.4L
1976 Holiday Rambler Presidential 3300 TT (still roadworthy... just in case)
1984 Chevy K2500 Suburban (just in case)
DesertDrew is offline   Reply With Quote
Old 06-20-2016, 11:17 PM   #19
Senior Member
 
Tom48's Avatar
 
Join Date: Apr 2015
Location: Ontario, California
Posts: 1,007
Quote:
Originally Posted by johnm1 View Post
Question (well, more of a statement) ... I thought A/C didn't work very well in AZ due to the dry air. Isn't that why most houses use a swamp cooler kind of thing?

I'm just asking because I don't know and I'd like to.
In a dry climate the water cooler works well and is much less expensive than refrigeration in extreme heat.
__________________
Tom48 is offline   Reply With Quote
Old 06-21-2016, 08:18 AM   #20
Senior Member
 
Join Date: Sep 2015
Location: Penfield
Posts: 176
Thanks all for teaching me the ways of the swamp cooler vs traditional A/C. I really thought A/C needed moisture in the air to work and that's where the swamp coolers come in. I'm feeling so smart now!

Thanks again!
__________________

__________________
John M
2013 GMC Sierra 2500DH CC, 4x4, D/A
2016 Forest River Vengeance 25V TT/TH
johnm1 is offline   Reply With Quote
Reply

Thread Tools
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



» Virginia Campgrounds

Reviews provided by




ForestRiverForums.com is not in any way associated with Forest River, Inc. or its associated RV manufacturing divisions.


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 07:22 PM.