Double Crossfire Build Question

[dodgersmom]

Ok, so I will soon be starting to build a double stacking crossfire 5x3x3 from birch plywood [undecided on thickness, so suggestions are welcome]
With this size I decided I would leave 6" space between the two for air circulation. Seperate from all other fresh air vents.
My question then is: will that space allow the bottom of the top viv to have temps independent of the lower viv; OR should I add insulation? Perhaps like the dense black building foam found in lowes?

I am making both the extra 12" tall to allow for all lighting fixtures to be mounted inside.
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Thats this 1st scenario (sp?). The other is this:
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My dragons love to climb :roll: so the other posibility that I am considering is instead of building a horizontal stacking unit; should I build side-by-side vertical enclosures? Which in the given space [unless I choose another location] would be max 3' long each [depth & height are not issues]
They like to spend time together so I would more than likely add a "dragon door" that I can close when they or I decide on seperate space.

Any thoughts/ideas are welcome.

 

[dodgersmom]

No advice? Opinions? Input?

WoW

 

[tgolden]

I would think building a taller rather then wider viv would make it harder to control your heat. Got to have a cool side

 

[dodgersmom]

Ya, I decided that after giving more thought to it.

I am still wondering though if the extra 12" will be enough seperation alone for the lighting heat control, or should I add a layer of foam insulation between also? I just don't want the top viv temps to get hotter.

Thanks for reply