Winter time and not a plant in your area can be found poofing pollen particles into the air.
So why are you still sniffling, sneezing and wheezing? It could be your furnace heating ducts.
If your house has a crawlspace, take a look under some of the room floor register grates, where the heating/cooling ducts terminate.
Do you see, what we see? … paper clips, pet hair, gold coins, dust, dirt, gum, pencils, pens, beads, paper, combs, dried food, diamond rings, crumbs, rodent droppings, insulation, bio-growths, etc… you get the idea.
What to do? Grab a shop vacuum.
Schedule an inspection – mention “I’d like a peace of mind inspection” – Save $25