I live in a 1962 built rancher, with a crawl basement, in the Pacific Northwest. My son has asthma and recently I bought a dehumidifyer to keep the rel. humidity down to around 45% on his bedroom. But as soon as turned the machine off, it starts to climb back up again to around 68%. I’m wondering if this is aggravating his asthma condition and what can I do to control the humidity.
p