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Old 12-05-2014, 10:41 AM
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Ted Trower Ted Trower is offline
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As medical units they are expected to produce 98% O2 for 20,000 hours of operation. As you go beyond that the percentage gradually drops. Additionally they do not tolerate hot humid conditions particularly well. Extreme humidity can damage the sieve beds that produce the O2 and shorten the functional life of the machine.
"It appears to me that glass men are the most given to drunkeness of any class of men I know" Peter Burt, recruiter in Europe, in a letter to Deming Jarves of the Boston and Sandwich glass company. -1826
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