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Old 07-17-2019, 04:35 PM   #1
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Air conditioning

So, were camping in 105 degree heat index, and the unit is doing everything possible but still 85 degrees in the camper, this is going to happen every year, Im just curious, should I look at adding another rooftop unit? Anyone else have a solution to this Problem?
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Old 07-17-2019, 04:41 PM   #2
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AC is not affected by heat 'index' only humans feel 'index'/AC can only lower temps by 15-20 degrees
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Old 07-17-2019, 04:52 PM   #3
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Parking in the shade is the very best thing you can do.

After that, add Reflectix to all windows that you can tolerate.

Use fans to move cool air around.

And finally, consider a 2nd A/C. In my 43' toy hauler, we have 3!
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Old 07-17-2019, 04:57 PM   #4
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If you have a 50amp service then yes add another AC unit. Cover all Windows and skylights with double bubble reflective foil insulation will help lower temp in camper as well.
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Old 07-17-2019, 05:22 PM   #5
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You didn't mention which rig you have. Reflex all the windows including the skylight if you have one. Make sure the AC is started prior to the interior reaching 80*. Clean the outdoor coil (up on the roof) make sure your filters are clean. Measure the Delta T between the cold air return and the output of the AC. 20* difference is about the best you will get.
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Old 07-17-2019, 05:31 PM   #6
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check your unit or build sheet to see if you have a 13.5 or 15 a/c unit. my rear is 15 and my front is 13.5. when im on a 30 am site that is sunny I have a hard time keeping up in the middle of day but it catches up at dark. 43 foot 5 slide 5th wheel
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Old 07-17-2019, 06:01 PM   #7
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Ok 94 degrees

Our unit is a 15,000 btu 34 Rockwood ultra light. I think its already prepped for a 2nd unit. Almost everywhere we camp is 50 amp so Im thinking another 15,000 btu unit will help considerably. Thoughts?
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Old 07-17-2019, 06:03 PM   #8
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Quote:
Originally Posted by SeaDog View Post
You didn't mention which rig you have. Reflex all the windows including the skylight if you have one. Make sure the AC is started prior to the interior reaching 80*. Clean the outdoor coil (up on the roof) make sure your filters are clean. Measure the Delta T between the cold air return and the output of the AC. 20* difference is about the best you will get.
Our unit is a 15,000 btu 34’ Rockwood ultra light. I think it’s already prepped for a 2nd unit. Almost everywhere we camp is 50 amp so I’m thinking another 15,000 btu unit will help considerably. Thoughts? We already have the reflective windows and skylights so plus night shades also.
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Old 07-17-2019, 06:28 PM   #9
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is your unit 50 amp? if so and prepped would help keep the cost of upgrade down.
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Old 07-17-2019, 06:50 PM   #10
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Yes to both.
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Old 07-17-2019, 07:53 PM   #11
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check the return and supply baffle to make sure there are no gaps between it.

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Old 07-18-2019, 03:30 PM   #12
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We have three AC units, 15000 and two 13500 for a 42 foot fiver. A good running AC will lower 21 degrees at best.
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Old 07-18-2019, 03:36 PM   #13
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Before adding another AC unit, I would try looking for air leaks, put Reflectix on the windows, and try adding a couple of fans to get the air moving into the cooling zones.
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Old 07-18-2019, 03:42 PM   #14
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Quote:
Originally Posted by Kamikaze View Post
Our unit is a 15,000 btu 34 Rockwood ultra light. I think its already prepped for a 2nd unit. Almost everywhere we camp is 50 amp so Im thinking another 15,000 btu unit will help considerably. Thoughts? We already have the reflective windows and skylights so plus night shades also.


We have a 33 rockwood. We added a second ac to bedroom. What a difference! On really hot days we close the vents in bedroom, set ac to a lower setting and let it force more ac into the living room. The 2 15k ac units keep up nicely. We added those mcd shades and that cuts out a LOT of heat. Although i think i will add that reflex stuff in the sun roof in living room and bathroom. So far... 93 outside... 73 inside. Last year with one ac... id be lucky to see 83 inside. Second ac was 100% worth it!
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Old 07-18-2019, 05:11 PM   #15
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We have a 38' travel trailer with one 15k AC. We keep a fan going inside at all times. The fan running makes a world of difference by keeping the air moving. We had a really hot summer a few years back and we put auto style sunshades in the bigger windows and it helped a lot.
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