As I posted before, my new system got installed a couple of days ago. So far I am happy, but in reading the manual, I realized that the manufacturer requires a "filter size" of 4 s/f. Yet the contractor installed a 16x25 filter, which is about 70% of a 4s/f filter. Is this a problem? The contractor is coming back next week, and I would like to be prepared when he is here. Any input is appreciated.
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