Positive pressure blower: When indoor fires pressure blower models will hypoxia blower, whose role is to send some of the fire evacuation routes oxygen exhaust fan: When the indoor fires price pressure blower, plus there will be a lot of smoke swf pressure blower, whose role is to discharge these smoke indoors. Poor ventilation in the basement for more positive: Merry absolute pressure (pressure) is greater than the outer wells or duct elevation outside the same atmospheric pressure (pressure), and the relative pressure (pressure) is positive, said positive pressure blower manufacturers Rich _ _ blower ventilation equipment provided by Dezhou Plumper ventilation plant. Dezhou Plumper ventilation plant (0) quality services and products, and are subject to approval and confidence in the new and old customers and the industry. Our company is a certified member of the whole network Commercial Union, Commercial Union customer service icon on the page, you can talk directly with our customer service staff, to our future cooperation happy!