Posted 11/28/2013 5:54 PM (GMT -6)
My furnace is a heat pump, so I can have the indoor unit run on low fan 24/7. I use the 4 inch filters, expensive, but no dusting! Very little, anyway.
For dusting I use the fluffy wands that grab the dust instead of letting it gtin the air.
I use Mucinex 12 hour (available OTC as generic) at night. It clears the sinuses and lungs by making the mucus thin so the cilia in the lungs can move it and the sinuses can drain faster. It's not an antihistamine.
I like saline squirt bottles, the big ones, for washing sinuses. Make sure to use only distilled or boiled water. (Brain-eating ameba has been found in tap water.)