Front room and shared room and fire elevator room pressure delivery outlet role outlet pressure is normally closed electrical outlet. Manual or electric pressure delivery outlet open offer, the chain will open fan. Stairwell if installed electric outlet normally closed, it would have set up a chain open fan pressure delivery outlet, if it is self-vertical blinds would not. This time the fans will need to open a remote electric control or manual control room open. Outlet pressure recommended installation height of not less than 0.9 meters, so you want to avoid the installation of guardrails measure low sill (aluminum blinds can not afford to fence effect); best qualified height greater than two meters, to avoid the pressure of the elderly, children, people with disabilities and other weak fallen. Pressure delivery outlet before the face | Rich ventilation equipment (certified) | positive outlet provided by Dezhou Plumper ventilation plant. Dezhou Plumper ventilation plant (www.frtfsb.com) is a leader in Dezhou, fans, ventilation equipment, over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Rich ventilation equipment in leadership with the staff warmly welcome all inquiries negotiations to create rich, ventilation a better future.