LPM is measured at what pressure

by mark reid
(Hollister, Ca usa)

Typical gaseous fuels like "Ng-Natural Gas or LP-Liquid propane) delivery system are set to 6-7 in/h2o or 12-14 in/h2o. Your product specification refers to a LPM of XX but does not specify the pressure behind the delivery system.

I assume the measurement is at atmospheric pressure. Thus developing a dual demand system would require a pressurization system to equal or exceed the base gas or (Ng or LP)