Acoustical Flexible Air Duct

Acoustical Air Duct Green Qualities

• Helps control sound generated by HVAC
• Available up to R-8 thermal value

Certifications/Performance Rating

GREENGUARD Indoor Air Quality Certified
GREENGUARD Children and Schools Certified
Acoustical Flexible Air Duct Data Sheet
Flexible Air Duct LEED Contribution Letter
Product Cut Sheet
• UL-181 Class 1 Air Duct
• Meets NFPA 90A and 90B and UMC 6-1


AMR-25 (25' length) is acoustic flexible duct constructed with galvanized wire helix and a unique sound transparent, spun-bonded, non-woven inner core. Fiberglass insulation (Choice of R4.2, R6, R8) encompasses the core and a metalized, reinforced vapor

Insertion Loss (IL):

• The Decrease in sound pressure level thru a length of duct compared to the same length of unlined sheet metal duct.
• 70dB with 10' Unlined sheet Metal Duct Returns at 60dB
• 70dB with 10' Flexible Air Duct Returns at 40dB
• IL = 60 - 40 = 20dB

Radiated Noise Reduction (NR)

• The reduction in sound pressure level thru the duct wall
• NR = 67dB - 60dB = 7dB

Airflow Generated Sound Power Level

• The sound generated by the airflow thru a duct
• 0dB through 10' flexible Air Duct with 2000 fpm air flow returns at 35dB

Features & Benefits:

- Superior Insertion Loss
- 10 Year Limited Warranty
- Unique Reinforced, Metalized Jacket
- Certified R-Values
- Airport Noise Reduction Solution

AMblue School

Product Data:

Diameter: 4", 5", 6", 7", 8", 9", 10", 12", 14", 16", 18", 20"
Length: 25 ft.
Packaging: 1 section per Carton
Vapor Barrier: Metalized, Reinforced Polyester
End Treatments: Raw Ended
Inner Core: Spun-bonded, non-woven fabric for maximum Insertion Loss (IL).
Product Nomenclature: AMR25 (R4.2) AMR25R6 (R6), AMR25R8 (R8)

Performance Data:

Thermal Value: R4.2, R6 & R8 Classified by Underwriters Laboratories, Inc. and bears the ADC Thermal Certification Mark. Owens Corning Fiberglass with Green Guard Certification.
Maximum Positive Pressure: 3" W.G. (5"-12")
2" W.G. (14"-20") determined per ADC Test FD-72-R1 at elevated temperatures with a 90° elbow. Maximum Negative Pressure: 1" W.G. (5"-10") 1/2" W.G. (12"-20")
Maximum Velocity: 4,000 FPM
Vapor Barrier Permeance: (Vapor Barrier) 0.006 US Perms Per ASTM E96A-94. Flexible air duct are
indoor applications only and should not be exposed to direct ultraviolet light.
Operating Temperature: 0-200° F

Code Compliance & Approvals:

Listed and Labeled Underwriters Laboratories, Inc.File # MH1 1637 UL-1 81 Class 1 Air Duct Flame Spread 25 or Less / Smoke Developed 50 or Less. Meets the requirements of NFPA 90A &90B & UMC 6-1. Licensed as a California Insulation Manufacturer # TD-1 092.

Air Vent Medical


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