... Range:100MM--250MM (4---10)Temperature Range: -30-+3000Max. Air Velocity: 30M/SMax. Working Pressure: 2500PaDensity: 20-32KG/M³ ... bear hot and fireproofing, can use for water heater, fanner, ventilator, center air-condition, and also can cleanse the workshop's ... be difficult and costly to be installed4. Ideal for all air conditioning/ventilation systems, such as hospital, hotel, commercial building ...