Filter Media for ceiling vents inside

Of course if local sources don't have it on hand, there's always Amazon.

Air Conditioner Foam Filter, 24-Inch x 15-Inch x 1/4-Inch

Probably any hardware store will have the foam material.

I haven't been able to pull it up at walmart.com.. possibly searching without the correct search criteria. I will go to the walmart tomorrow - thanks

Patrick45 wrote:
Looking for a source for this material that I can cut to fit just above the grill inside my Cedar Creek Cottage. 1/4 - 3/8" Thank you

It's available at the RV Superstore A.K.A. Walmart in the AC filter aisle.

Mine has the foam filter like what is used on window units. Available in the filter areas at WalMArt and Home Depot.