G99 Air Filter Gage
Know when to change your filter!
Qty Per Unit: 1 Gage
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See the G99-14 Air Gage Remote Mount, listed to the left, to extend the installation location by 10 feet.
Comments:
No 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, raising the vane to indicate a filter change is necessary.
• Dial design is easy to read and interpret when filter needs to be changed.
• Easy to calibrate for new, clean media.
• Easy installation.
• Built-in filter screen removes dust from sampled ambient air to keep gage clean.
• May be mounted remotely up to 10 feet from monitoring location (with extension kit).
• Easy to disassemble/assemble for service.
• Low cost.
APPLICATION
The G-99 Air Filter Gage provides a visual indication of the need to replace the air filters in forced air heating and
cooling systems. 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, raising the vane to
indicate a filter change is necessary.
The gage may be calibrated in a negative pressure range from 0.1 to 0.4 inch w.c. When properly calibrated in this range a vacuum increase of 0.10 to 0.15 inch w.c. will indicate a filter change is necessary.
PRECAUTIONS
The installer should be an experienced service technician. When drilling the hole in the blower compartment extreme care should be taken not to damage components within the heating or cooling system.
INSTALLATIONS
The gage must be located where it can sense pressure conditions in the blower compartment between the filter and the blower. Select a location on a vertical surface enclosing the blower compartment and drill a 3/8" hole. Remove the protective paper from the foam adhesive strip on the back of the gage. Mount the gage in a level position with the pressure sensing tube projecting into the blower compartment.
CALIBRATION
Install a clean filter and run blower on highest speed. With a small screwdriver adjust the calibration screw, on the face of the gage, to put the pointer in the clear area in the center of the green "FILTER IS CLEAN" range.
OPERATION
Install a clean filter and run blower on highest speed. With a small screwdriver adjust the calibration screw, on the face of the gage, to put the pointer in the clear area in the center of the green "FILTER IS CLEAN" range. SERVICE
The gage may be disassembled for service although this should rarely be required since it contains a small filter screen to stop dust from entering the area of the vane. Remove gage and, from the back, push white plastic clips out with a blunt tool. Remove calibration screw, lift off clear cover and dust all parts with a clean brush. Reassemble and test that the vane moves freely in the gage. A fresh adhesive strip may be required to reinstall.
NORDIC PURE AIR FILTERS
Also check out our Air Conditioner Filters / HVAC Furnace Filters listed below. If you don't see your size furnace filter, we can also make your odd size air filters; just visit our Custom Filters page to order online. You will need the EXACT measurement of your filter since air filters are usually a fraction of an inch smaller than filter size listed on side of air filter.
Thank you for your interest in Nordic Pure Nordic Pure A/C & Furnace Filters
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