We don’t live in cold country. We don’t need to winterize the bus like when we lived in Colorado. Now we’re set-up in off-site storage though; no trip plans anytime soon; so we took some steps over the weekend to minimize the amount of heat the bus collects and holds. The shades are drawn. We’ve put reflective insulation (air bubble wrap inside two layers of foil) in the windshield and drivers-compartment side windows,
added insulated plugs to the overhead vent spaces,
and also installed reflective insulation in the shower skylight.
We’re plugged in, the slides are now closed, and the air conditioning is on and set at 90 degrees to limit temperature extremes.