Double Double Grille Grille, widely used in air conditioning system for the air outlet, Chengde pressure delivery outlet, according to requirements, the latter may be formulated aluminum outlet air flow control valve (miter gate), offer low pressure delivery outlet , double Grille having two mutually perpendicular slices adjust the horizontal and vertical page page sheet ... outlet pressure recommended installation height of not less than 0.9 meters, thus avoiding the installation of guardrails to measure low sill (aluminum blinds afford fence effect ); best conditions to a height greater than two meters, to avoid the pressure of the elderly, children, the disabled and other weak blown. Low pressure delivery outlet quote _ Rich ventilation equipment (certified) _ Chengde pressure delivery outlet provided by the Dezhou rich ventilation plant. Dezhou rich ventilation plant (www.frtfsb.com) (www.frtfsb.com) is an industry leader in Shandong Dezhou, fans, ventilation equipment, over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum Limits to meet customer needs. Rich ventilation equipment in leadership with the staff warmly welcome all inquiries negotiations to create rich, ventilation a better future.