Extra filter in duct

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  #1  
Old 05-16-20, 11:52 AM
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Extra filter in duct

Ok dumb question. Changing my AC filter today and noticed this extra carbon looking filter screwed to the side of the duct above the regular filter. What is it and why is it there? Something to make the air smell better?



 
  #2  
Old 10-21-20, 08:16 PM
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Return air vents

can I put my return air vents that are panned in joist of kitchen flooring, underneath my island? I was told I can cut hole under island and add vents at base? So is there no need to move panning running in joists?
 
 

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