EOSF1220N9-1S (12"x2"), EOSF1350N32-1S (13.5"x5"), EOSF1355N35-1S (13.5"x5.5")

The September 2025 handbook's Embers Out description lists EOSF1220N9-1S at 12 by 2 inches, EOSF1350N32-1S at 13.5 by 5 inches and EOSF1355N35-1S at 13.5 by 5.5 inches in its Elite Soffit/Foundation group. Its separate EORV Retro-Fit group includes EORV1350N31-1S at 13 by 4.75 inches. Use the stated dimensions with the exact model designation; the digits in a model code are not a substitute for its listed size.

The vents use 22-gauge galvanized 1018 cold-rolled steel with 1/8-inch square openings on the exterior surface. Inside the vent body are two layers of Textech Belcotex silica-fiber mat. OSFM gives the density as 12.6/15.4 ounces per square yard without explaining the slash. That notation does not identify a separate value for each layer.

These are perforated-steel vents with internal mats, rather than a specification for woven replacement screen. ASTM E2886 is the cited test protocol for the assembled product. For a soffit, foundation or retrofit selection, identify the listed model and follow the manufacturer's installation instructions and product data sheets referenced by OSFM. Confirm the exact GOVmotus entry with the complete vent construction retained.