Louvered Steel Door Units — Fire-Rated & Non-Rated Louvers
Louvered Steel Door UnitsFire-Rated & Non-Rated Louvers
A complete steel door unit with a louver built in, for boiler, mechanical, trash and storage rooms that need airflow: a 20-gauge door, a 16-gauge welded or knock-down frame, spring hinges and a UFD lock, with a fusible-link fire louver or a non-rated louver.
Pick your louver
Every louvered unit starts from our complete door unit — door, frame, hinges and lock — with the louver cut and installed in our shop. Louvered units are priced by quote.
Fire louver (fusible link)
Keeps the door's fire rating. The blades close automatically when heat melts the fusible link — the choice for boiler and mechanical rooms in rated walls.
Rated openingsFusible linkNon-rated louver
A fixed louver for airflow where no fire rating is required — storage rooms, trash rooms and unrated mechanical spaces.
Unrated openingsFixed bladesLouver sizes
Choose 12" × 12", 18" × 18" or 24" × 24". Tell us the airflow or size on your drawings and we'll match it.
12×12 · 18×1824×24Everything for one ventilated opening
- 20-gauge hollow metal door1-3/4" thick, louver cut in our shop
- Fire-rated or non-rated louver12×12, 18×18 or 24×24
- 16-gauge steel frameWelded or knock-down, throat to match your wall
- (3) 4-1/2" UL spring hingesSelf-closing, satin chrome
- UFD knob or lever lockStoreroom, entrance or passage function
Welded or knock-down?
Throat depth is the overall wall thickness the frame wraps. Pick the frame type, then the throat that matches your wall.
Welded frame
One rigid piece with welded corners, set as the wall goes up. The strongest option for masonry and concrete block walls and new construction.
Masonry & block wallsThroat: 4 7/8"Knock-down frame
Ships in three pieces and wraps a finished drywall opening — ideal for retrofits and tenant fit-outs. 3 3/4" fits 2-1/2" studs, 4 7/8" fits 3-5/8" studs (5/8" drywall each side), 6 1/8" fits thicker walls.
Drywall / stud wallsThroat: 3 3/4" · 4 7/8" · 6 1/8"Airflow without giving up the rating
Boiler & mechanical rooms
Combustion and ventilation air through the door, with a fire louver where the wall is rated.
Built in our shop
Louver openings are cut and the louver installed before it ships — no field cutting.
Matched to your drawings
Send the louver size or free area from your plans and we'll build to it.
How to pick the right swing
Stand on the outside of the opening — the side the door swings away from.
Right hand: hinges on the right, door swings away from you.
Left hand: hinges on the left, door swings away from you.
Reverse (RHR / LHR): the door swings toward you — call us if you need a reverse swing.
Measuring: order by nominal door size. A 36" × 80" unit has an actual door of about 35-3/4" × 79-1/4" and an overall frame of about 40" × 82". Check your drawings or local code for the required swing — or send us your rough opening and we'll confirm.
Send us the opening. We'll quote it today.
Tell us the door size, frame type, louver size and whether it needs a fire louver. We'll send an itemized price.
Louvered door questions
What's the difference between a fire louver and a non-rated louver?
A fire louver has a fusible link that closes the blades in a fire so the door keeps its rating. A non-rated louver stays open and is only for openings that don't need a fire rating.
Which louver sizes do you offer?
12" × 12", 18" × 18" and 24" × 24".
How are louvered units priced?
By quote, based on size, frame, louver type and lock. Call (718) 455-8442 or request a quote.
Welded or knock-down frame — which do I need?
Choose welded for masonry or block walls and new construction (4 7/8" throat). Choose knock-down for an existing drywall or stud wall: 3 3/4", 4 7/8" or 6 1/8" throat to match your wall thickness.
How do I get my door unit?
Pick up at our Brooklyn or Long Island location, or we deliver to your job site. Installation is available in NYC, Nassau and Suffolk. Call (718) 455-8442.