Group 27 Vented Battery Box

[CodyPereira]

Hey all,

My family recently ordered a new 2017 Rockwood 8299BS 5'er, expecting arrival in the next 8 weeks or so. The current box is a single battery box, vented out the side of the trailer. We periodically boondock, therefore we use a Group 27 battery, and would like the ability to run dual batteries. Has anyone found a dual battery vented box that they're happy with? My dad and I have searched a bit online, and the most common result are the snap top battery boxes, which obviously would not work being that the box itself is not sealed. (The battery location is under the master bedroom, hence the need for a vented box to the outside.)

Any help is much appreciated.