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Ductless mini-split air filters
I'd very much like to install mini-splits in my small Cape Cod, which is presently cooled by window units. The one thing that's holding me back is concern over the performance of the indoor units' air filters and the resulting impact on coil cleanliness. The mini-split filters I've seen don't look like they'd be anywhere near as effective as the pleated paper filters on my furnace when it comes to trapping fine dust. I'm guessing the manufacturers have to make a tradeoff between filter efficiency and pressure drop, due to the nature of the mini-split blowers, but I'm not looking forward to the task of cleaning a coil located on a wall in a finished space.
Is this a realistic concern?