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Old 07-01-2015, 08:47 AM   #11
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Dual pane windows are made with two sheets glass put together with a small gap between them. The dry air between them (better units would use a dry, inert gas instead of air but you won't see them in RVs) acts as an insulator to reduce the flow of heat through them. However, the sealant on the spacers that separate the two sheets of glass can fail, allowing moist air to leak into the space between the glass which can later condense out, causing fogging.

Repair consists of disassembling the window, cleaning up the glass, etc., then reassembling them with new sealant on the spacers and injecting dry air between the panes. Sometimes, the moisture that sneaks between the panes can cause glass etching that either needs to be polished out (if only very mildly etched) or the glass will need replacing (what usually happens when the glass is etched). Repairs are expensive due to the high amount of labor required and gets even more expensive if glass needs replacing (just the fact the letters RV are involved jacks up the labor rate).

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Old 07-01-2015, 10:15 AM   #12
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Our Greyhawk has the single-pane frameless windows. Unless you encounter an intense driving rain, they do keep the water out when open.

WDW and I have wondered if it is okay to drive with them open at highway speeds, say 60 mph. Has anyone done that?

I did notice on the Fantastic Fan site, their FAQ says it is okay to drive with their fan lid open. They even mention their fan cover has a lifetime warranty.


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Old 07-01-2015, 07:37 PM   #13
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Originally Posted by TexasRT View Post
Just curious, what is the process for repairing the dual pane windows? When you say repaired do you mean replacing the moveable panels?
I have them and they are new, but I was just wondering for future reference.
I think they're great. They are way more insulating than the old sliders in our other unit.
The company I used removed the windows from my 5'er on a Monday morning. At the time they removed the windows they covered each opening with cardboard and taped it up so it would not leak. I lived in it at their facility while the work was being done. They have hookups with power and water and a dump on site and no extra charge for this. On the next day, Tuesday, they replaced 5-6 of the smaller windows, Wednesday saw several more of the larger ones, and Friday was the last two big ones. They would have done these last two on Thursday, but they knew I wasn't leaving until Saturday and they wanted the last two to sit an extra night after their rework.

They actually take the frames apart, separate the two pieces of glass, clean the glass, and reseal and reassemble the glass in the frame.

One thing that was very interesting was being in my 5'er with no window to look out of. You talk about feeling like you are in a cave!


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2010 Jayco Designer 35RLTS, Cummins/Onan RV QG 5500 EVAP, Progressive Industries EMS-PT50C, TST Systems 507 TPMS, RV Flex Armor Roof
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