Recently had to replace our original Dometic triple-fuel refrigerator in our 17B. After looking at options and pros/cons, we selected a Vitrofrigo dual (AC/DC) model of similar size. My question is what we should do with the exterior (high/low) vents, which I assume were there for LP operation? Not concerned with seeing vents outside, but can/should we cover them up from interior since new unit is not LP.