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American UL certification AS/NZS4859.1 Consultants Europe American Society for Testing & Material Quality Assurance Centre of CQCA China National Standard Wahlee glasswool board is in rectangle with many choices of unit weight. The heat insulation materials are usually using "2b" centrifugal glass temperature keeping board, the average diameter of fibre is around 7 micron with the types of faced or no face for all. With the features of light, wear and tear resistance and tenacity, it satisfies the heat insulation requirements. It can save the energy, reduce heating wastage and cut the cost, if build it correctly, the transmission of sound wave can be reduced effectively. Usage WAHLEE glasswool board is the unearthly sound absorbing and warm keeping material. It has been widely applied for heat insulation of house wall, compartment; temperature keeping of computer rooms, refrigerator; denoise of power plants and pump rooms; adjustment of Hi-fi etc.Standard Specification Unit Weightkg/m32432404856648096Thicknessmm15202530405075100Sizemm1200*600R-Value (ASTMC177 & ASTMC518) Heat Resistance Value (On 24) Thickness(mm)48kg/m356kg/m364kg/m396kg/m3250.80.80.80.8401.21.21.2-501.51.51.6-R=Thickness/Heat Conduction Coefficient (Unit: m2·/W) Package Choices of plastic and case packaging. Sound Absorbing Coefficient (ASTMC423) TypeUnit Weight(kg/m3)Average Thickness(mm)Octave Band Central Frequency (Hz)125250500100020004000NRCNon Face48250.110.280.680.900.930.960.70Non Face48500.170.861.141.071.020.981.00Enhonced Aluminum FoilFace48250.180.750.580.720.620.350.65Enhonced Aluminum FoilFace48500.630.560.950.740.600.350.75Non Face96250.020.270.630.850.930.950.65Enhonced Aluminum FoilFace96250.270.660.330.660.510.410.55NRC-Denoise Coefficient Leaving the air layer or sticking the decoration of the surface if using the glasswool board as the sound absorbing material. In the thickness range of 100 150mm of the air layer, more thicker more absorption rate. If adding the thickness to 300mm, the effective absorbing range will increase to 100Hz. Condensation Control The figure in right is the warm keeping and heat insulation thickness used in different temperature and humidity of the environment. All the data are received from the built glasswool board, the thickness is not less than 75% and the inner temperature is on 14 degree. The maximum allowed value of relative humidity can be found on the abscissa. From this point upright going to till cut the egality abscissa passed the maximum allowed value of the temperature. Choosing the effective glasswool board thickness from the point of intersection.