I respect the fact that not everyone either chooses to or has opportunity to run a/c full-time. Mold is also reliant on heat however. Heat can cause a wide variety of issues for internal furnishings and contents. Whether a home or motorcoach in Florida, internal temperatures should be kept no higher than 80 degrees, and dehumidifiers are recommended.
Our coach, as do many owners also using covered storage facilities, keep the coach powered to allow for one of their roof-mounted a/c units to run. We leave our coach fully stocked, thus we use a setting of 78 degrees, which keeps temperatures down and dehumidifies the interior. We use the coach once every six weeks, so all onboard systems get used regularly. This practice over many years has never revealed any issues.
Chris & Deb Werlhof, Venice, FL
2021 Jeep Grand Cherokee L
2022 Coachman 215RBK