PPV in Single-Family Dwellings: Not the Only Option

10/01/2009
BY BRIAN ARNOLDThe Oklahoma City (OK) Fire Department introduced positive pressure ventilation (PPV) during the late 1980s and early 1990s. It began removing from the apparatus old smoke ejector fans, which moved approximately 3,200 cubic feet per minute (cfm), and replaced them with new, gasoline-operated positive pressure fans that move between 15,000 and 23,900 cfm. Our department has had some success in our newfound tool; it is considered only one of several ventilation options for truck crews arriving on-scene.But over the past several years, I have seen a trend developing in many departments that may one day result in a catastrophe. PPV is sometimes the only ventilation method they ...

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