Insulation: AC Air Intake Box

 

My air intake box has a little spray foam around it, however it doesn't look like much.



I plan to insulate the box with at least R5 and I may add R2 around the ducts.


Image 1

We can see from the image that I am losing heat. 

Image 2

I estimated it's R Value to be around R0.1, which is terrible. It drops by roof from R5 to R3. As such I've put R5 around it.

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