I finally received a reply from Swift ref. this problem. Please see the General Section under "Swift Gas Locker" for details.
We have a fleetwood heratage 640cb and on inspection of the gas locker we too have the same two unprotected vents on the locker floor... Not any more, Thanks Theresa you may have saved someone's life by informing us all.We had the same problem with our Bailey last year.
Bought it brand new (S5 Pageant) and on first trip lost aquaroll handle out of front locker.
Dealer reimbursed cost of handle.
Baileys response "we'll pass your comments on to our designers". Nothing was done about it.
The locker has an inch wide gap across the full length of the front locker so we have to be very careful what we load in it.
Talk about taking responsibility for your products!