Multi-louver vents stack several angled metal louvers, or a fine metal filter, inside one frame. Many are designed to drop into the opening you already have.
Protection is RF1's read of published tests, not a lab rating. Prices are rough ranges based on a 2024 California study, not RF1 quotes.
How it works
Each louver turns the airflow. Embers hit the metal and lose energy instead of flying straight in.
Some models add a metal micro filter behind the louvers to catch smaller embers.
Retrofit versions fit the existing cavity, so the stucco or siding around the vent usually stays untouched.
Who makes it
Non-flammable louvered vents and filters for soffit, frieze board, gable, foundation and dormer openings, including retrofits.
They say: Retrofit vents fit into the existing cavity, per Embers Out.
Descriptions are each maker's claims, not RF1 test results. Before buying, confirm the exact model on the State Fire Marshal's Building Materials Listing (vents are category 8165).
What it costs
Rough installed costs, based on the 2024 Headwaters Economics study. Embers Out sells direct and through its online store.
These are rough ranges, not RF1 quotes. Most RF1 jobs land between $500 and $5,000, and your plan prices every vent before anything is booked.
Want to know if a drop-in retrofit works for your vents?
Compare your mesh to real-size samples, or have Mark check every vent in person, free.
A free assessment, a plan with prices, and one team to do the work. Pasadena, Altadena and across Southern California.
