The answer to 'dehumidifier installation cost' is that the cost can vary significantly depending on several factors. In general, professional dehumidifier installation can range from around $300 to $800 or more, depending on the size and complexity of the system, the accessibility of the installation location, and any necessary ductwork or electrical work required.
Factors that can influence the cost include the type and size of the dehumidifier, whether it needs to be integrated into your home's HVAC system, the difficulty of the installation site, and the labor rates in your local area. It's important to get quotes from multiple local HVAC contractors to compare options and find the best value for your specific needs.