I have seen both humidifiers and dehumidifiers however you may have to order it online if it's not at the store assuming they still carry it
Yes, they do.
They do carry humidifiers. The store staff are helpful. You can ask them for it if you can't find it.
I don't work there, but i have seen "humidifiers" at big home repair stores like this one. I'm not sure about "dehumidifiers".
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