I would say probably not but the box looks well ventilated.A few more detailed pictures would not go a miss.
My reservation with it, is the strap attachment. The plastic clips are all well and good but offer no stability or balance when picking up the box with ferrets in.
I do like the look though.
Again to the OP. how is the now back attached ? And is the box sealed?
Plastic doesnt sweat but you do get condensation caused by the body heat and breathing of the occupants. These boxes are well ventilated and there is a drain hole in the bottom of each compartmant.The backs are stapled using