/filter/airdustfilter/vs/0 was the dump's only unbound href -- this board's
internal deodorizing filter, same filterUsage/filterStatus field pair as
common.WATER_FILTER, but filterUsage here is already a 0-100 percentage
with no filterCapacity to divide by (confirmed by filterStatus=="wash" at
filterUsage=="100"). Uses air_-prefixed keys so a fridge with both a
water and an air filter gets two distinct entities.
Marc Billow
26c9168fb7