Industrial Utility Efficiency    

NFPA 99 Medical Air

In the U.S. as an example, the NFPA has taken the view that if your compressor draws in good clean ambient air, the air stays clean through the compressor, is then dried and filtered, when you deliver it to the patient it will be entirely satisfactory. After all, when you went into the hospital that’s what you were breathing and when you leave you will breathe it again!
This article will examine in detail four of the five acceptable WAGD implementations under NFPA 99, along with some alternative ways they may be implemented. This article will not deal with passive implementations.
Large hospitals often use compressed air for important operational related end uses. The systems that produce this air need to supply clean and dry compressed air with a high level of reliability. These systems are not immune to efficiency problems as is the case for any compressed air system.
BSA LifeStructures is a full service architectural and engineering firm specializing in healthcare, higher education and technology facilities. We employ close to 260 associates and are established in two locations; Indianapolis and Chicago. Our strongest focus is on hospitals and university facilities.
Hazardous breathing conditions exist in routine industrial operations, such as hospitals, abrasive blasting, paint spraying, industrial cleaning, and arc welding. In these and other operations that introduce contaminants into the workplace, supplied-air respirators are frequently used for worker protection.
A good-size hospital with 200 beds and ten operating rooms can have a medical air system, a laboratory air system, and pneumatic air systems. The medical air systems must all follow the NFPA 99 guidelines. We follow these guidelines, from the beginning, when we assess the demand for air in a hospital.
The most abundant contaminant in any compressed air system is water. This can be in either liquid or vapour form. Atmospheric air is already very wet, and becomes saturated when compressed. This water vapour will condense when the temperature drops, after the compressor, and will damage air receivers, pipework and equipment. For this reason coalescing filters and then dryers are used to remove the bulk of this water.  
Located in the bowels of most hospitals, you will find the source of the Level 1 Medical Air compressed air system. Per the NFPA Section 99 Specification (National Fire Protection Association), Level 1 air compressor systems provide air for human consumption within the hospital facility.
The NFPA 99 (National Fire Protection Agency) Standard for Healthcare Facilities (2005 Edition) is the current Code by which Healthcare facilities in the U.S. design their compressed air systems.  The NFPA 99 Standard covers many requirements for medical gases, with compressed air being just a component of the Standard.