We are seeing lots of stuffy noses and nighttime asthma problems lately with the colder weather and use of forced air heaters in the home. Air ducts that have not been cleaned in the past few years may have dust or mold in them, and when you turn that heater on for the first time, expect a big puff of whatever is in the ducts to be in your bedroom.
Solution? If you cannot clean the ducts immediately, close off the vent in your bedroom and use a radiant space heater instead. Or, you could use a vent filter in the register itself to trap some of the particulates. Taking an antihistamine at night or running your bedroom HEPA filter may also be helpful.
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