The difference between the "levels" is in the fluff area more than anything else. By that I mean the exterior and interior decorations as well as some of the stuff they put inside the rig like flooring. They do not have the capacity to run a lot of different assembly lines for the basic structure. They all have cheap and easy fiberglass batting all around, other than the slide side walls. Those and the slide floors / ceilings have air space. No room for that pesky insulation. You may notice a change if there are single pane vs dual pane windows but that will be minimal as is the insulation effect of those expensive gadgets.
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Mike Nancy and the fuzzies
Fulltiming since June 2004
Volvo 660 MH tow vehicle
2005 MS 38RL
2007 Saturn Ion "toad"
2010 Gold Wing "piggyback"
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