QUATRO
Air Technologies Inc.
Fresh Air Purifiers
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Engineers Of Clean Air
CONVERTING FROM RECIRCULATION TO NEGATIVE PRESSURE
For AF-1000RNP units with serial numbers less than 75288
Step 1.
Remove all filters from the AF-1000 and place a cardboard or plastic sheet over the fan
assembly to catch as much steel material as possible during the cutting/drilling process.
If you decide not to replace the HEPA filter you must place something on top of the filter to
protect against the metal shavings dropping into the filter.
Step 2.
Remove the three black supply grilles by using a slotted screwdriver and pressing on the four
tabs located on the black grilles.
Step 3.
Use a jig saw or other type of steel saw to cut the metal material out in between the grilles to
leave a large rectangular opening.
Step 4.
The extra supply collar plate has been supplied; it has an
6’’Ø or 8” Ø opening.
