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Asthma & Allergy Friendly® Certified and Verified Healthier Air™ Fiberglass Insulation

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Products / HVAC / Performance+® Air Duct Board

Performance+® Air Duct Board

Performance+® Air Duct Board

Performance+® provides excellent thermal and acoustic performance that minimizes unwanted sounds and allow for quiet, efficient air delivery. This duct board is formaldehyde-free, and has a lightweight non-woven airstream surface mat made with ECOSE® Technology. 

Applications

Certifications
Data Sheet
(843.40 KB PDF)
Submittal Sheet
(843.40 KB PDF)
View All Downloads
REVIT
(1.81 MB RVT)

Product Features

Built To Perform
Performance+® Air Duct Board is designed for high thermal and acoustical performance. It reduces the noise generated by air turbulence and mechanical equipment, while helping to maintain temperature.
Sustainable
As part of our commitment to sustainability, this formaldehyde-free insulation uses our patented bio-based binder.
Versatile
Fabrication is simple and streamlined. Multiple sizes are available, there are minimal capital requirements, and only one trade is needed to fabricate and install.
Product Details
Technical Data
Technical Data
Property (Unit)TestPerformance
CorrosivenessASTM C665Does not accelerate corrosion of steel (Insulation)
CorrosionASTM C1617Pass (Insulation)
Maximum Service TemperatureASTM C411250° F (121° C) (Insulation)
Water Vapor PermeanceASTM E96, Procedure A0.02 perms or less
Water Vapor Sorption (by weight)ASTM C1104Less than 5%
Flexural RigidityNAIMA AHS-100-74
Available in 2 stiffness values: El-475 and El-800; Flexural rigidity (El) is the product of Young's modulus of elasticity (E) and moment of inertia (I)
Air VelocityUL 181Max. 5,000 ft./min. (1,524 m/min.) Tested to 12,500 ft./min. (3,810 m/min.)
Internal Static PressureUL 181Maximum ±2" water (498 pascals [Pa])
Microbial GrowthASTM C1338, ASTM G21, UL 181Pass, does not support the growth of fungi or bacteria
Surface Burning Characteristics (flame spread/smoke developed)ASTM E84, UL 723FHC 25/50; UL Listed
Forms Available
Forms Available
Type Size* Edge Pieces/Carton**
EI-475 1" (25 mm) 48" x 96" (1219 mm x 2438 mm) Shiplap 8
EI-800 48" x 120" (1219 mm x 3048 mm) Butt, Shiplap 6
EI-800 1.5" (38 mm) 48" x 120" (1219 mm x 3048 mm) Shiplap 4
2" (51 mm) 48" x 120" (1219 mm x 3048 mm) Butt, Shiplap 3

*Other lengths available on custom order basis. **Palletized packaging available on request.
Thermal Resistance R & Thermal Conductivity K
Thermal Resistance R | ASTM C518 Mean Temperature 75° F (24° C)
Thickness R-Value (R.S.I)
1" (25 mm) 4.3 (0.76)
1.5" (38 mm) 6.5 (1.14)
2" (51 mm) 8.7 (1.53)
“R” Units ft2 ∙  hr  ∙ ˚F BTU m2 ∙ ˚C W)
Thermal Conductivity K | ASTM C177 Mean Temperature 75° F (24° C)
  K-Value
EI-475 and EI-800 0.23 (.033)
“k” Units BTU ∙ in ft2 ∙  hr  ∙ ˚F W m2 ∙ ˚C)
Sound Absorption Coefficients
Sound Absorption Coefficients | ASTM C423, Type A Mounting
Octave Band Center Frequency (Cycles/Sec.)
Thickness 125 250 500 1000 2000 4000 NRC
1" (25 mm) 0.03 0.25 0.62 0.92 1.03 0.97 0.70
1.5" (38 mm) 0.02 0.44 0.96 1.17 1.16 1.12 0.95
2" (51 mm) 0.19 0.64 1.08 1.13 1.06 1.06 1.00
Friction Loss & Recommended Maximum Duct Dimensions Without Reinforcement
Friction Loss
Ft./min. Hydraulic Diameter
Velocity 10" 16" 24" 32" 40" 72" 100"
500 0.056 0.031 0.018 0.012 0.009 0.005 0.003
600 0.077 0.042 0.025 0.018 0.013 0.007 0.004
700 1.04 0.57 0.034 0.24 0.018 0.009 0.006
800 0.134 0.074 0.044 0.031 0.023 0.011 0.008
900 0.169 0.093 0.056 0.039 0.029 0.014 0.010
1000 0.207 0.114 0.068 0.048 0.036 0.018 0.012
2000 0.806 0.443 0.266 0.186 0.141 0.069 0.046
3000 1.797 0.988 0.594 0.415 0.315 0.153 0.103
4000 3.179 1.748 1.050 0.734 0.557 0.271 0.181
5000 4.952 2.724 1.636 1.143 0.867 0.422 0.283
 
Recommended Maximum Duct Dimensions Without Reinforcement*
Internal Pressure
Inches of Water		 EI-475-1" EI-800-1", 1½", 2" 13⁄16"
0.5 (125)† 1.0 (249)† 2.0 (498)† 0.5 (125)† 1.0 (249)† 2.0 (498)† 0.5 (125)† 1.0 (249)†
Positive 36" (914 mm) 24" (610 mm) 15" (381 mm) 36" (914 mm) 24" (610 mm) 18" (457 mm) – 22" (558 mm)
Negative 34" (864 mm) 24" (610 mm) 14" (356 mm) 36" (914 mm) 24" (610 mm) 18" (457 mm) 22" (558 mm) –

*This table summarizes span/pressure limitations for unreinforced duct. For larger ducts, refer to NAIMA’s “Fibrous Glass Duct Construction Standard,” or Knauf Insulation's Air Duct Fabrication Manual. †(Pressure—Pascals [Pa])
All Product Resources
Data Sheet - Performance+™ Air Duct Board
March 2025PDF (843.40 KB)
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GREENGUARD Gold - Performance+® Air Duct Board
December 2025PDF (859.87 KB)
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GREENGUARD - Performance+® Air Duct Board
December 2025PDF (849.16 KB)
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UL Environmental Claim Validation - Formaldehyde Free - Performance+® Air Duct Board
December 2025PDF (752.83 KB)
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Safety Data Sheet - Performance+™ Air Duct Board - Canada - French
May 2024PDF (225.34 KB)
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Safety Data Sheet - Performance+™ Air Duct Board - North America
May 2024PDF (208.07 KB)
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Safety Data Sheet - Performance+™ Air Duct Board - North America - Spanish
May 2024PDF (210.47 KB)
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Revit File - Performance+ Air Duct Board
May 2024RVT (1.81 MB)
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