Series 4166: Ultimate Sound Control
When acoustic performance is critical, Woodfold's Series 4166 delivers FSTC 41 maximum sound reduction with dual-wall construction. Engineered for meeting spaces, medical facilities, and critical acoustic applications where silence is essential.
Acoustic performance you can depend on
Why Series 4166 Delivers Maximum Acoustic Performance
When meeting rooms require complete privacy, medical facilities need quiet spaces, and corporate environments demand sound isolation, they specify Series 4166. This isn't just a door—it's an acoustic barrier engineered for the most demanding sound control requirements.
The Acoustic Challenge
Standard doors allow sound transmission that compromises privacy and concentration. Conversations leak through, distracting noise penetrates, and critical acoustic isolation fails. Your space loses its functionality when sound control is inadequate.
Series 4166 provides FSTC 41 maximum sound reduction with specialized dual-wall construction. Engineered with acoustic materials and advanced construction techniques that create an exceptional sound barrier while maintaining operational reliability.
Why Series 4166 Stands Apart
FSTC 41 Maximum Rating
Exceptional sound reduction performance that creates complete acoustic separation. The highest FSTC rating available for accordion doors, perfect for critical acoustic applications.
Dual-Wall Construction
Advanced dual-wall design with acoustic core materials delivers superior sound performance. Engineered for maximum acoustic isolation while maintaining smooth operation.
Industrial Grade Quality
Built for commercial and institutional applications with heavy-duty components and precision engineering. Designed to withstand frequent use while maintaining acoustic performance.
Professional Finish Options
Available in various premium finishes that complement acoustic performance. Choose from options that enhance your professional environment while maintaining sound effectiveness.
Series 4166 Specifications
Maximum Sound-Control Construction
Series 4166 features advanced dual-wall construction engineered for FSTC 41 maximum sound reduction. Designed with premium acoustic materials and specialized construction techniques that create exceptional sound barriers for critical acoustic applications.
Where Series 4166 Excels
Series 4166 Installations
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Get instant pricing for Series 4166. The ultimate acoustic performance, custom-built to your specifications.
Configure Series 4166 NowSeries 4166 — Details, Finishes & Measuring
For higher sound control in meeting spaces, medical facilities, or religious institutions, Woodfold Series 4100 Acoustic Accordion Doors take sound attenuation to our highest level. High quality, with an FSTC of 41, the 4100 series doors feature a perimeter seal, acoustic lining, and heavy-duty hardware. Available in two panel widths: 4166 is the dual 6″ panel, and the 4188 incorporates the same pantograph geometry for ease of use with a larger 8″ panel.
Five contemporary vinyl laminate finishes are available.
Field Sound Transmission Class: The dual-walled Series 4100 Acoustical Partition has a field sound transmission class (FSTC) rating of 41.
Field tests were preformed by Acoustical Engineer Inc. of Eugene, Oregon following the procedures specified in ASTM Test Designation: E366-96.
- Panels: 6” or 8″ wide by 1⁄2″ thick medium density fiberboard with routed edge for vinyl hinging.
- Hinge assembly: 16 gauge steel, pantograph action for dualwall door assembly.
- Panel Connectors: Flexible vinyl, color-coordinated to panel selection, inserted and attached into routed edges. Standard colors: White, Sand, Gray, Brown
- Track: 2” x 1-1/4” aluminum, pre-punched for screw fasteners for surface mounting.
- Sound Seal: Dual-wall door with internal acoustic material, flexible vinyl sweep strips mounted on top and bottom of the door. Wood molding mounted on both sides of track forming a wide sweep surface.
- Acoustical liner: Applied to inside faces of both walls.
- Wheels: Nylon-tired steel ball bearing wheels; 4 wheeled carriers on each volute and at lead post.
- Lead Post: Extruded aluminum, 3-7/16” x 4-7/8” cross-section, with jamb molding. Color-coordinated to panel connectors.
- Jamb Molding: 2-1/8” wide by 15/16” deep aluminum.
- Handle: Metal
- Latch: Deadlatch with thumbturn two-sides/one side and a range of keylock options available.
- Width: Contact Customer Service for connector options
- Height: Vinyl-Lam up to 10′ 1″
- Stack Width: 4166 Series 14 1/2″. 4188 Series 18 1/2″
Notes:
- Series 4100 not available in hardwoods or with curved track.
- Production schedule: Usually 4 weeks from order date
* Field Sound Transmission Class: The dual-walled 4166-4188 Acoustic Partitions have field sound transmission class rating (FSTC) of 41. Field tests were performed by Acoustic Engineer of Eugene Oregon following the procedures specified in ASTM designation E 336-90.
PLEASE NOTE: The stain and color samples on this page have been color matched using a monitor calibrated to the sRGB IEC1966-2.1 color profile. Intended only as a guide for color selection, the actual finish materials will vary due to the natural and acceptable variations in wood grain characteristics, textures, and color tones, as well as the color variation that occurs among individual computer monitors.
*All panel samples show factory default color combinations, unless noted otherwise.
Natural Hardwood Veneers
Woodfold has today’s most popular hardwood species to match your interiors. Woodfold insists on select grade veneers, laminated to an engineered core to ensure excellent dimensional stability. Clear finish is standard; however, custom-stained finish service is always available.
Vinyl-Lam Woodgrains
Incredibly realistic looking, Woodfold’s Vinyl-Lam woodgrain finishes provide a wide range of color selection representing several wood species. Woodfold’s Vinyl-Lam finishes are laminated to an engineered core to ensure excellent dimensional stability.
Solid Colors and Textures
Woodfold’s solid color, multi-textured vinyl’s are selected to compliment the most popular current interior colorations. Woodfold’s Vinyl-Lam finishes are laminated to an engineered core for excellent dimensional stability.
Hardware & Connectors
Coordinating Hardware Hinge System A clear (silver) finish is supplied with Off-White and Chalk. A bronze finish supplied with all others.
Coordinating Vinyl Panel Connectors We carefully color coordinates our vinyl panel connectors as a standard feature.
To assure correct sizing of your Woodfold accordion door the finished opening should be measured precisely from side to side for width and from the header surface where the track will be attached, to the finished floor or counter surface for height.
Width Measure the width at the bottom, halfway up and at the top of the door and use the widest dimension you have. Note: if the widest dimension is at the bottom or center you may have to trim the suspension track to fit your opening at the top of the door as track lengths are made to the ordering width. This can be done with a hacksaw.
Height Measure from the top of the finished floor to the point where you are going to attach the track. NOTE: For those areas where the floor is uneven (e.g. concrete floors) please take 3 or 4 height measurements along the floor. Use the shortest measurement as the finished opening height except 2100, 3300 or 4100. For sound doors use tallest height.
Dimensions should be stated width first and then height and should represent sizes after any and all modifications have been done to the opening. Unless customer specified, we will allow 9/16″ floor clearance for doors over 4′ high and 5/16″ for doors 4′ and less. Beware of variations in floor and/or ceiling surfaces.
Please check your measurements for accuracy. Contact us if you need additional assistance.