Front room and shared room and fire elevator room price pressure delivery outlet, outlet pressure is normally closed electrical outlet. Manual or electric pressure delivery outlet open, the chain will open fan. If the installation of electric stairwell normally closed outlet factory outlet if positive, is also set to open a chain of positive pressure fan outlet size, 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. Positive pressure air supply should be set between the fire elevator room, stairwell front room and stairwell. Intermediate front stairwell room and stairwell to select a place to install the line the main purpose is to reach the pressure, so that the smoke could not come on the line. Front room is open every mouth floors are an outlet, two floors of stairs to open an outlet. Rich positive pressure ventilation outlet size _ [] _ ??pressure delivery outlet provided by rich ventilation equipment. Looking for "fans, dampers, pressure delivery outlet" reliable suppliers, choose a whole network business alliance certification: Dezhou rich ventilation plant (0), trustworthiness and reliability, now click on the "Business Alliance customer on the page "with our live chat now!