I am a US Dealer for Mountain High Oxygen System (Craggy Aero
www.craggyaero.com) and have found their products and support
excellent. I infomed the factory of the above post. They forwarded
me the response to Tim Harrison.

Tim...your E-mail was forwarded to me and I would like to give you some
facts based on the MH EDS units.

Your statement that "Several units (quantity unknown but could be many)
were calibrated using an incorrect curve after a change in technical
staff" is incorrect and based on false information. I have no idea
where you came up with that absurdity but where ever you got your
information it would require further corroboration before making such a
general false statement.

There never has been an EDS unit shipped that has not been completely
tested for function as well as quality. That is why MH can give each
unit a lifetime warranty.

We have thousands of the units being used worldwide under a variety of
conditions and no one --NOT ONE--has ever indicated a problem of your
nature.

There is no "Recall" and your statement about mild to moderate hypoxia
can only lead me to believe that you have other problems.

Each unit is tested for proper oxygen pulses at altitudes based on
standards through stringent testing at established University and
Military test sites. We know what we are talking about. If anything,
the profiles are scheduled richer than they need to be to compensate
that the average pilot is not twenty-five years of age.

However, about 3 years ago, in an effort to help persons with
cyne-stokes like breathing issues at altitude, the EDS had an addition
alert added that detected inspiration efforts that did not follow
through to the end of the delivery pulse at higher altitudes. Some of
these units were sold in N.Z. as well as Europe. We know where they are
by our records and they were was found not suitable for all types (of
persons). It resulted in having the alert go off with almost every
inspiration effort which caused concern with many. Because this alert
issue was an individual issue, we decided it did not warrant any type
of a recall., rather a reprogramming to disable the alert. Therefore,
any and all who found the alarm a problem simply had to contact us and
send the unit in where we disabled it by reprogramming it. Furthermore,
all new units at this point do not have this post-flow alert and is so
noted with a new firmware version.

It may be interesting to note however, that with chamber testing, we
can verify that the EDS unit is scheduled to deliver about 2.5 times
more than is needed for a typical person at altitude. This, we found,
more accurately reflected the condition of the real flying population.
Therefore, if you feel that the unit is indeed not operating properly,
please send it back to us for a check-up, at no cost to you.

We at MH take great pride in the quality of our products and our
customer service. If in the future you have a problem, we are the ones
to help you with it. Please do not hesitate to call, fax or E-mail.
Best regards,
Robert Jamieson
CEO


Richard Pfiffner
Craggy Aero
www.craggyaero.com