The answer to 'how much does humidifier cost in Illinois' is that the cost of a humidifier can vary significantly depending on several factors. Typically, whole-home humidifiers in Illinois range from around $300 to $800 for the unit and installation, while portable humidifiers can cost $50 to $300 depending on the size and features.
The final cost will depend on the type of humidifier (whole-home vs. portable), the size of your home, the brand and features, and the complexity of the installation. It's best to get quotes from local HVAC contractors to determine the specific cost for your home and needs.