We are discussing the merits of having 6" foam filled studs for the walls. The need for ventilation negates the benefit of high R in the walls. Yours are 1.5" thick...?With a small roof vent and cracking a window, we rarely have condensation issues, even in cold temps with two adults and two dogs.
ANY ventilation makes the concern a non-issue.
The diminishing returns are in the wall. "Optimal" wall R value in a camper will be less than it is in a house.Okay, so if we use walls that aren't thinner than a house (higher R-value), then we would reach that point of exchange air heating/cooling diminishing returns later- is that right?
We are talking about a large camper, are we not? So no, the need for ventilation does NOT negate the benefit of high R in the walls.We are discussing the merits of having 6" foam filled studs for the walls. The need for ventilation negates the benefit of high R in the walls. Yours are 1.5" thick...?
Instead of "good amount", Id suggest "enough"You need a good amount of constant air exchange, and you'll need that regardless of how good your insulation is.
Constant is not required, especially when most people remain in their camper at MOST for 6-8 hours at a time.you will need to constantly bring in fresh air, or it will get uncomfortablely humid pretty quickly.