That is the expected results when good filters are used. In addition,the air is healther,house dusting is less,and there is energy savings. Just for the record,$8 or $10 filters do about as well except taking pollen and mold spores out of the air which in itself is worth $20 to people with sensitive respatory systems( probibly more than 50% of us over 60.) In addition to using a good filter you can hedge the benifits even farthur. When replacing the air handler insist on a 25x25 or 20x25 filter holder. Simple math tells us the 20x25 has over twice the suface of 12x20 or 16x14 which translates to lasts twice as long. I fabricated holders that hold 2 20x25 filters 3" apart when installing my units. I use a $4 paper pleat in first one air passes through and $15 pleated high effeciency downstream. I get 3 months out of the $4 one and 6 months easy from the $15 filter because it has no dust or lint on it,only black stuff I assume I would rather not breath. To judge when a pleated filter is due,non too soon nor too late,hold it up to weak light. After several days you will note only about 25% of deepest part of crease restricts light while the other 75% of high points are clean as new. As time passes,the coverage creeps toward the peaks of pleats. Just as light is passing unrestricted 1/8th inch on each side of peak is time to change.
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Today's Featured Article - Restoration Story: Fordson Major - by Anthony West. George bought his Fordson Major from a an implement sale about 18 years ago for £200.00 (UK). There is no known history regarding its origins or what service it had done, but the following work was undertaken alone to bring it up to show standard. From the engine number, it was found that this Major was produced late 1946. It was almost complete but had various parts that would definitely need replacing.
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