United States / Build / Wildfire Defense Vent Screen — WDM 98 OSFM BML configuration

Wildfire Defense Vent Screen — WDM 98 OSFM BML configuration

Name: Wildfire Defense Vent Screen — WDM 98 OSFM BML configuration
Brand: Bushfire Mitigation Solutions (Wildfire Defense Mesh)

This is a listed vent assembly. Listing 8165-2397:0001. This site cites ASTM E2886. Match the model and orientation.

Kind: listed-assembly. Brand: Bushfire Mitigation Solutions (Wildfire Defense Mesh). Listing evidence: OSFM WUI handbook 2026-08-25. Page reviewed 2026-08-25. JSON (CC BY 4.0)

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Aperture 0.0657 inch is the mesh value on attributes, with ASTM E2886 as the test standard. OSFM 8165-2397:0001 is the WDM 98 BML configuration.

Warnings say the manufacturer's current precise mesh values round to the dimensions in the BML description, and to match the WDM 98 BML product, finished size, flange, mesh, frame, orientation, and fasteners.

Lot comparison follows that rounding note: the listed WDM 98 configuration is the comparable object.

Documented attributes

Each value below points to its field-level manufacturer, official-listing, test-report, or standard-body evidence.

Attribute	Value	Evidence source
Form
Assembly role	retrofit mesh	Wildfire Defense Mesh product and vent comparison (manufacturer)
Dimensions
Mesh opening	0.0657 in	Wildfire Defense Mesh product and vent comparison (manufacturer)
Wire diameter	0.0177 in	Wildfire Defense Mesh product and vent comparison (manufacturer)
Material
Material	stainless steel	Wildfire Defense Mesh product and vent comparison (manufacturer)
Corrosion resistant	Yes	Wildfire Defense Mesh product and vent comparison (manufacturer)
Fire
Test standard	astm e2886	OSFM Building Materials Listing — 8165-2397:0001 (official-listing · Listing 8165-2397:0001, TEST PROTOCOL)TEST PROTOCOL: ASTM E2886

Published requirement matches

These links are generated from the cited attributes above. They do not decide installation or a project result.

California ASTM E2886 vent · California mapped fire hazard areas

Program	ID / source	Evidence date	Expires	Status
CAL FIRE BML	8165-2397:0001 · Search BML for 8165-2397:0001	2026-08-25	2027-06-30	listed

Tests and programs cited

ASTM E2886 · test-method
ASTM E84 · test-method
OSFM BML · listing-program

Models named on the listing

Model	Application
WDM 98 BML Vent Screen 6 × 17	foundation vent screen with 0.75-inch frame
WDM 98 BML Vent Screen 8 × 17	foundation vent screen with 0.75-inch frame
WDM 98 BML Vent Screen 8 × 16	foundation vent screen with 1-inch frame

Specification notes

The manufacturer's current precise mesh values round to the dimensions in the BML description. Match the WDM 98 BML product, finished size, flange, mesh, frame, orientation, fasteners, and opening coverage to OSFM listing 8165-2397:0001; ASTM E2886 use is vertical only.

Can I use this here

Local force

The rule and every matching product for the United States

Requirement constraints (8)

Each table compares this product's documented attributes with one published requirement. The comparison does not change from place to place, so it is printed once.

ORSC R327 vent mesh undocumented
Field	Required	Documented value	State
Assembly role	Assembly role is one of foundation vent, retrofit mesh, soffit vent	retrofit mesh	matched
Mesh opening	Mesh opening 0.0625 in–0.125 in	0.0657 in	matched
Corrosion resistant	Corrosion resistant = Yes	Yes	matched
Noncombustible	Noncombustible = Yes	Not documented	undocumented

IWUIC vent mesh undocumented
Field	Required	Documented value	State
Assembly role	Assembly role is one of foundation vent, retrofit mesh, soffit vent	retrofit mesh	matched
Mesh opening	Mesh opening ≤ 0.125 in	0.0657 in	matched
Corrosion resistant	Corrosion resistant = Yes	Yes	matched
Noncombustible	Noncombustible = Yes	Not documented	undocumented

California ASTM E2886 vent matched
Field	Required	Documented value	State
Test standard	Test standard = astm e2886	astm e2886	matched

Colorado CWRC vent mesh undocumented
Field	Required	Documented value	State
Assembly role	Assembly role is one of foundation vent, retrofit mesh, soffit vent	retrofit mesh	matched
Mesh opening	Mesh opening ≤ 0.125 in	0.0657 in	matched
Corrosion resistant	Corrosion resistant = Yes	Yes	matched
Noncombustible	Noncombustible = Yes	Not documented	undocumented

2018 IWUIC Class 1–2 vent mesh undocumented
Field	Required	Documented value	State
Assembly role	Assembly role is one of foundation vent, retrofit mesh	retrofit mesh	matched
Mesh opening	Mesh opening ≤ 0.25 in	0.0657 in	matched
Corrosion resistant	Corrosion resistant = Yes	Yes	matched
Noncombustible	Noncombustible = Yes	Not documented	undocumented

2021 IWUIC Class 1–2 vent mesh undocumented
Field	Required	Documented value	State
Assembly role	Assembly role is one of foundation vent, retrofit mesh	retrofit mesh	matched
Mesh opening	Mesh opening ≤ 0.25 in	0.0657 in	matched
Corrosion resistant	Corrosion resistant = Yes	Yes	matched
Noncombustible	Noncombustible = Yes	Not documented	undocumented

2006 Utah UWUI Class 1–2 vent mesh undocumented
Field	Required	Documented value	State
Assembly role	Assembly role is one of foundation vent, retrofit mesh	retrofit mesh	matched
Mesh opening	Mesh opening ≤ 0.25 in	0.0657 in	matched
Corrosion resistant	Corrosion resistant = Yes	Yes	matched
Noncombustible	Noncombustible = Yes	Not documented	undocumented

2006 Utah UWUI Class 3 vent mesh undocumented
Field	Required	Documented value	State
Assembly role	Assembly role is one of foundation vent, retrofit mesh, soffit vent	retrofit mesh	matched
Mesh opening	Mesh opening ≤ 0.25 in	0.0657 in	matched
Corrosion resistant	Corrosion resistant = Yes	Yes	matched
Noncombustible	Noncombustible = Yes	Not documented	undocumented

Sources

2025 OSFM WUI Listed Products Handbook (2 September 2025) — CAL FIRE OSFM (official). Accessed 2026-08-23.
OSFM Building Materials Listing search — CAL FIRE OSFM (listing-body). Accessed 2026-08-23.
Wildfire Defense Mesh product and vent comparison — Bushfire Mitigation Solutions (manufacturer). Accessed 2026-08-25.

Wildfire Defense Vent Screen — WDM 98 OSFM BML configuration. FireApproved. https://fireapproved.com/materials/bushfire-mitigation-solutions-wildfire-defense-mesh-wildfire-defense/. Last verified 2026-08-25.