My 26BH came with the chill and store option - basically they stick a dorm fridge in one of the storage compartments. There is no additional ventilation in the compartment and it is in the same compartment as my water heater. I did notice that heat builds up in there with the compartment closed. My son sleeps on the bunk directly above it and I was thinking it will probably be uncomfortable for him to sleep if it is hot out. Other than that, I haven't had a problem with using it.
2013 Jay Flight 26BH
2008 Nissan Armada LE 4x4