Supplies air for one blast helmet. Air flow is 10 cfm at 5 psig. The EDP10 is lightweight at only 49 pounds! When placed in a clean air environment, Bullard Free-Air pumps offer a low-cost means of supplying clean, breathable air to respirator wearers working in contaminated environments up to 300 feet away from the pump. They are easy to operate and maintain. Free-Air pumps do not require temperature alarms, CO monitors or airline filters, so they can be a cost-effective alternative to compressed air.