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M-67 wrap-around prefilter

PDF M67 • PDF M67 Op Manual • M-67 wrap-around prefilter

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M67 Ext Prefilter.jpg (8995 bytes)


The PN 07112, Wrap Around Prefilter, attaches to the intake of the M67 Mechanical Air Cleaner. This prefilter assembly holds a two inch thick polyester filter pad, PN 41106, that is 26’ x 63". Part Number 07112, Wrap Around Prefilter Assembly, is hinged to allow easy access to the primary filters inside the M67. The wrap around prefilter assembly will add an additional 20" to the overall length of the M67.


1. Remove the fitters from the M67. Be certain that the power to the M67 has been disconnected.

2. Place the M67 and the wrap around filter assembly on a stable surface for the installation.

3. Line up the seven holes in the wrap around filter hinge over the seven holes on the side of the M67 opposite the latch.

4. Secure the hinge to the outside surface of the M67 with the No. 8 screws and lock nuts provided.

5. Place the primary filters in the M67 and then latch the wrap around filter assembly in place.

6. Tuck the fitter pad into the frame. The white surface should be facing out.

7. Please note that the M67 must be at least 24" away from the wall to allow the wrap around filter assembly to swing open to access the primary filters.

8. Please refer to Pg. 7 in the M67 Owners Manual for instructions on installing the M67.

9. Routinely inspect the prefilter pad and replace when the surface of the pad is loaded with contaminant. Excessively dirty pads will reduce the airflow through the air cleaner.



Do not install the extended prefilter pad in an environment where sparks or flames could be drawn into the filter. Although the filter pad, PN 41106, is flame retardant (UL Class 2), the contaminate captured in the pad could be flammable.

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