Ventilation & air exchangers
...cost you maybe $20 to $30 at most hardware stores. If you have an issue, crack your window a bit for now until you sort it out. Humidifiers, dehumidifiers and air purifiers are available to deal with some of these issues.
A dehumidifier will cost between $200 and $300 to purchase, and maybe $10 to $15 a month to oper...