GeneralAire G99 Air Filter Gage Pack of 1 control system on the face of the

on the face of the gage

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Niwa provides commercial grade features

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All outlets are surge protected

GeneralAire G99 Air Filter Gage Pack of 1 control system on the face of theNo more guessing! An easy to use, easy to read gage to monitor filter media loading so that filter media may be changed when needed. The gage is installed between the blower and the filter, where a slight vacuum exists due to the air flow resistance of the air filter. Air flowing into the gage, around the calibration screw, lifts a vane in proportion to the negative pressure in the blower compartment. As the air filter loads, the vacuum increases,