Can I extend my 6x8 walk-in box to an 8x10 on the same refer unit?

Hi,

Just posted this to HVACadvice, but it might have been the wrong place for it.

Got an old 6x8 kolpak camlock box and refer unit, will be moving to a new space & new unit soon.

Looking to temporarily (2-3 month) eke out extra cold storage space. Panels that fit are a pain to find. Can I:

A. Depend on walls+ceiling made of 2x 2inch R-10 XPS panels, 2x 3/4 inch plywood? Thinking of extending the wall about 46" to one side.

B. Depend on the same condenser unit that's keeping a 6x8 unit at 35-40 to keep a 10x8 unit at the same temp?

submitted by /u/blacktongue
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