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.
Improved LCD control (standard on both SEPG and HPNM
models) simultaneously monitors and displays at all times: preset delivery pressure, actual delivery pressure, flow rate and DI water quality.