Will a dehumidifier help with serious asthma (infection, smoking, physician)

[loves2read]

My sister in law is in her early 80s and has asthma--not from smoking.
She lives in Victoria. Her asthma has usually been under pretty good control but her now-fired GP failed to diagnose a bronchial infection earlier this year and she got pretty sick...Damp weather (which Victoria has) also makes her asthma worse--heavy air...

Does anyone know if a dehumidified might help?
She has the room air purifiers to help deal with pollen, dust, and other air-born particles but it does nothing for the high humidity that the area might have...

Thought we might get her one for Christmas if it would help--
Normally she is very active and in good health but the combination of bad diagnosis by her GP and the winter wetness is making her pretty blue...

[ToucheGA]

It might not hurt to give it a try, though I would ask her physician first.

[Hedgehog_Mom]

There are two downsides to using a dehumidifier. First, it puts out hot air. In the winter that's not too bad, but in the summer it can be pretty miserable. Second, it puts out water. You've either got to empty the bucket or run a hose to a drain. The bucket holds a couple of gallons of water and might be too heavy for an elderly lady to handle easily.

Another thing, I used to babysit a little girl who had bad asthma and she had to use a humidifier to sleep. Without the humidifier beside the bed, she coughed all night long. And that was in the humid weather we have here.