View and Download NuTone HRV90H specification sheet online. ... 30 ppi washable reticulated foam ... Page 1 FRESh AiR SYSTEM FEATuRES • 20% smaller than comparable ...

Hi, I'm looking to minimize dust in my system because its really pissing me off... i've been looking for bulk fan filters and all I run into is.. foam with different ppi sizes and mesh... but not sure if the mesh is the correct one in fan filters made of mesh. Home » Reticulated Foam Sheets » 10mm Deep Reticulated Foam Sheet » 20PPI Reticulated Foam Sheet, 10mm Deep, 1.2mtr x 2.0mtr 20PPI Reticulated Foam Sheet, 10mm Deep, 1.2mtr x 2.0mtr Images are for illustrative purposes only. Home » Reticulated Foam Sheets » 10mm Deep Reticulated Foam Sheet » 20PPI Reticulated Foam Sheet, 10mm Deep, 1.2mtr x 2.0mtr 20PPI Reticulated Foam Sheet, 10mm Deep, 1.2mtr x 2.0mtr Images are for illustrative purposes only.