Thanks for your question on Health Care Magic.
I can understand your situation and problem.
Yes, dehumidifier will definitely help you.
Since you are smoker, your lung defense system is already weakened.
In humid air, micro organisms grow faster and cause
respiratory tract infection.
The incidence is even higher in smokers.
Dehumidifier extract humidity from the air and keep it dry.
So micro organisms are less in dry air. So it is safe in smokers.
So for you dehumidifier is safe to prevent recurrent respiratory tract infection.
Hope I have solved your query. I will be happy to help you further.
Wish you good health. Thanks.