Winter INSULATOR/COVER for the Ceiling A/C Vent?

Jim-Linda wrote:
There is no direct access to the outside from the A/C vent you are referring to. No need to insulate.

Jim

I agree with Jim, but it would not hurt to put an insulate, such as reflectix in place of the filter. A small amount of heat could escape that area just by transfer, but not nearly as much as the vent caps, that you have already taken care of.

Jerry