A high-pressure supply source would be either a cylinder or “cascaded” cylinders of breathing air or the compressed air supply within a facility/spray foam rig as long as it is filtered and monitored to ensure it meets OSHA’s purity requirements for breathing air.
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If you want the most complete fresh air system, a high-pressure system is what you are looking for. These systems are usually mounted in the trailer or come in a pelican carry case, and they require a compressor large enough to supply the proper flow and pressure to the system. The longer hose length, better cooling options, and reduced setup time make this the most efficient system available.
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Safety note: Air pumps must be placed in a fresh air zone. Follow the scheduled maintenance for filter change to ensure that your product is working correctly.