Glass wool felt is an excellent material for thermal insulation of air ducts of AC
systems. In addition, it absorbs vibration and reduces noise generated from
air ducts. It is light in weight and resistant to fire. This product features a
veneer of aluminum foil which serve purposes of decoration and radiation
protection.
Insulation Board for AC Ducts
Physical Properties
Unit
Index
Standard
Density
Kg/m³
50 – 80
GB5480.3 –1985
Average fiber diamter
µm  
5
GB5480.4 –1985
Moisture rate
%
< 3
GB10299 – 1988
Thermal conductivity
w/m•k
≤ 0.04
GB10294 – 88
Combustibility Grade
 
Non-combustible Grade A
GB8624 – 1997
Sound absorption coefficient
 
24 Kg/m³ 2000 Hz
GBJ47–83 (note)
Service temperature
°C
≤ 120
GB11835 – 89