I'm just wondering what is the difference with 1/2" Plenum Spacer, 5/16" Plenum Spacer, and 5/8" Plenum Spacer. Is there really a BIG difference? Because the 5/8" Plenum Spacer is much cheaper than the 1/2" and 5/16" ones.
And what is the difference between the 1/2" Plenum Spacer and 1/2" ISO Thermal Plenum Spacer?

Which one is Best for the $$ ?

thankss

 

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but just stay with the 5/16 its the best

 

Please spend some time researching in the Tech Area. These questions have all been asked/answered before.

 

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