dual pane windows

1. No

2. Yes

When I was full timing I purchased custom made storm windows that fit very snug. Made a tremendous dfference. I would say forfull timing it is a good investment. Aside from greatly reducing drafts it lowered noise from outside.

My 2006 Southwind came with dual pane. Over the years, they fogged up so badly I had to replace them. I chose to replace rather than repair so I had 1/4 inch safety glass installed. Not cheap but I will never worry about fogging up again.

My previous fiver a Cedar Creek had single pane windows. My Mobile Suites has insulated windows which would be what you call double pane. Anyway I had had the unit for 13 months with no issues. They do help with heat/cool and the unit is very quiet. The windows are a plus and yes my next unit will have them. We live in our fiver as we are full timers.

I have a 96 Southwind with dual pane Windows.
A couple of them have moisture between the panes. I didn't get around to repairing them yet, they really don't bother me.

I have looked at RV's with single pane windows, never owned one.

Our next RV will have dual pane Windows. I feel they are a little quieter and better insulated.