HPNM - What does HPNM stand for? The Free Dictionary
References in periodicals archive
The Chrysalis II HPNM
(high-performance, no-maintenance) hydrogen generator does not require routine maintenance.
The line offers two series of hydrogen generators; the "SEPG" Series, which utilizes a desiccant purifier, and the "HPNM
" Series, which is non-desiccant based and requires no monitoring and maintenance.