MicroFiber Glass Wool Insulation with Perforated Foil PFL Duct Liner
Price 1,120.00 บาท – 1,600.00 บาทPrice range: 1,120.00 บาท through 1,600.00 บาท
Product Details
MicroFiber glass wool for duct sound absorption with perforated aluminum foil surface, density 32K – 48K, thickness 25 mm – 50 mm
Saves energy, controls condensation, and absorbs duct noise to prevent disturbance to building occupants
Micro Duct Liner
MicroFiber Micro Duct Liner glass wool insulation is designed for internal duct installation. It reduces air noise within ducts and can operate at temperatures up to 120°C with airflow speeds of 5,000 fpm (25.4 m/s) without erosion, tested according to UL 181 Erosion Test standards.
Maintaining Cool Air in Ducts
Air temperature inside ducts is low at 13-15°C while outside temperature is higher at 25-30°C, causing heat exchange at the duct surface. Therefore, insulation is needed both inside and outside the duct to reduce heat transfer and maintain cool air until distribution.
Condensation Prevention
Condensation is common in air conditioning systems due to temperature differences between cold air inside ducts and warmer air outside. When warm external air contacts the cold duct surface, water droplets form on the duct surface.
Insulated cooling ducts prevent surface condensation
Similar to a glass containing ice developing condensation on its surface, or when insulated ducts still show condensation due to insufficient insulation thickness, extremely cold internal air, or very hot surrounding temperatures.
Acoustic Properties
The main purpose of Micro Duct Liner insulation is to absorb noise generated within air ducts from high air velocity. The porous nature of glass wool insulation absorbs sound waves upon impact with the insulation surface.
Sound Absorption Coefficients (SAC) indicate the percentage of sound absorbed versus reflected. For example, PFL 3225 at 2000 Hz has SAC = 0.93, meaning 93% absorption and 7% reflection.
SAC values vary with sound frequency
Noise Reduction Coefficient (NRC) คือ is the average of SAC values at 250Hz, 500Hz, 1000Hz, and 2000Hz. An NRC of 0.9 means the material absorbs approximately 90% of sound on average.
NRC is the material’s average total value
Sound Absorption Coefficients (Type “A” Mounting)
|
Product Type |
Thickness (mm.) |
Sound Absorption Coefficients, ASTM C423 (Type A Mounting) Octave Band Center Frequencies (Hz) |
||||||
|
125 |
250 | 500 | 1000 | 2000 | 4000 |
NRC |
||
|
PFL 3225 |
25 |
0.00 |
0.25 | 0.74 | 0.92 | 0.93 | 1.00 |
0.70 |
|
PFL 3250 |
50 |
0.12 |
0.44 | 1.02 | 1.07 | 0.84 | 0.78 |
0.85 |
|
PFL 4825 |
25 |
0.02 |
0.27 | 0.73 | 1.04 | 1.05 | 0.88 |
0.80 |
|
GTS 4850 |
50 |
0.20 |
0.86 | 1.12 | 1.07 | 1.01 | 0.99 |
1.00 |
|
GLC 4825 |
25 |
0.06 |
0.33 | 0.66 | 1.08 | 0.94 | 0.85 |
0.75 |
|
GLC 4850 |
50 |
0.24 |
0.90 | 1.11 | 1.11 | 1.03 | 1.01 | 1.05 |
Surface Materials for Micro Duct Liner Glass Wool
- Perforated Foil (PFL) surface finish
- Glass Tissue (GTS) surface finish
- Glass Cloth (GLC) surface finish
Product Size Table
Micro Duct Liner Size Chart
|
Density (Kg/m3) |
Thickness (mm) |
Size (W x L) |
|
32 |
25 |
1.22 x 2.44 |
|
50 |
1.22 x 2.44 |
|
|
40 |
25 |
1.22 x 2.44 |
|
50 |
1.22 x 2.44 |
Technical Data Table
|
Features |
MicroCover |
Test Standard |
|
Operating Temperature |
121°C |
ASTM C 411 |
|
Density |
32 kg/m3, 40 kg/m3 |
|
|
Water Vapor Absorption |
< 1.0% at 49°C, 95% RH |
ASTM C1104 |
|
Mold and Fungus Growth |
Does not promote mold and fungus growth |
ASTM C665 |
