Until we bought our first motorhome (a Chausson 630) earlier this year, we'd been caravanners for over 30 years. Every one of our vans had built-in low-level ventilation, including gas drop vents under every gas appliance. I can't see any vents in our motorhome, except for the ones around the skylights, and the underside seems to be sealed tighter than a duck's bum. Really don't understand the difference, or am I missing something obvious.




