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Old 01-13-2016, 03:00 PM   #1
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Winter condensation

Got the cover on the rig. Last winter I left an incandescent lamp (regular house lamp) on all winter inside. Is this a good idea to reduce condensation or not necessary?


Current RV: 2001 Jayco Eagle Class C 28 ft Ford V10 Triton
Previous RV: 1989 Winnebago Warrior Class C 27 ft Ford V8
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Old 01-13-2016, 03:06 PM   #2
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The lamp won't have any impact on condensation. Better to crack a roof vent or 2 for airflow.


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Old 01-13-2016, 03:25 PM   #3
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I would rather have windows cracked and put some damp rid inside to take out the humidity and stop condensation and mold..
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Old 01-14-2016, 06:21 AM   #4
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Winter condensation

Wintertime in cold climates is typically very low humidity. Condensation in an RV in that climate is caused by the sun heating the interior during the day and the nighttime cooling causing the RV to 'inhale' slightly more humid daytime air.

If there is no open vents or windows there is no way for that moisture to get back out and it just builds up and up.

As was stated, merely leaving vents or windows open will prevent this.

In my case I have a MaxxAir vent cover on the bathroom vent, that vent is only ever closed if we're in the unit in cold weather.

In fact leaving it open while driving in cold weather makes the back of the motorhome FAR warmer and less humid too.
Ted 'n' Laurie, plus Jackson (aka Deputy Dog, the Parson Russell Terrier 'fur kid') and, Rylie (who crossed the Rainbow Bridge June 14, 2012).
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Old 01-14-2016, 06:34 AM   #5
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I just leave the roof vents opened about a third of the way and the windows cracked slightly. This has worked for me, always a fresh smell and no mildew odor.
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