"BuT bEtTeR qUaLiTy FiLtErS dOn'T wOrK!!!1!"
More or less exact quote from the last annual inspection of my unit. Landlord's agent was laughing at my attempts to continue to breathe now that new(ish) neighbours use scented laundry products and their vent is VERY close to my furnace intake.
Exhibit A: less general wheezing over winter during laundry times