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GeneralAire G99 Ventilator Filter Gage


GeneralAire G99 Ventilator Filter Gage
$12.62 /ea
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Product Information

The GeneralAire G99 is the correct replacement for the following Ventilators:

  • GeneralAire Whole House Ventilators

The GeneralAire G99 Ventilator Filter Gage is an easy-to-read and easy-to-use gage that monitors the ventilator filter media loading so that your filter can be changed when needed. The air that flows into the gage around the calibration screw lifts a vane in proportion to the negative pressure in the compartment of the blower. As the air filter loads, you will notice that the vacuum increases, that helps to raise the vate to indicate that a filter replacement is necessary.

This GeneralAire Ventilator Unit Air Filter Gage features a dial design that is easy to interpret when your filter needs to be changes. Calibration and installation is easy for a new, clean filter media. The built-in filter screen removes dust from sampled ambient air that helps to keep your air cleaner filter gage clean. With the extension kit, the GeneralAire G99 Gage can be mounted remotely up to 10 feet from the monitoring location. This filter gage is easy to assemble and disassemble when servicing is required.

GeneralAire Ventilator Filter Gage specifications:

  • Part 4002
  • Dial Design
  • Easy-to-use
  • Easy-to-read
  • Easy installation
  • Easy to calibrate
  • Built-in filter screen
  • Monitors filter media loading

The gage is installed between the filter and blower and must be located where it can sense pressure conditions in the blower compartment between the filter and the blower.
Select your location on a vertical surface enclosing the compartment of the blower and drill a 3/8" hole.
Remove the protective paper from the foam adhesive strip on the back of your GeneralAire G99 gage. Mount your ventilator gage in a level position with the pressure sensing tube projecting into the blower compartment. Next, replace your air filter gage.


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4002 is used in the following Models
 GeneralAire AC22
 GeneralAire AC24
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