A whole-house dehumidifier is typically installed in the home's HVAC system, usually near the air conditioning unit. The dehumidifier is connected to the HVAC ductwork, allowing it to remove excess moisture from the air as it circulates through the system. Some models may also be installed as a stand-alone unit in a utility room or basement and ducted to the home's HVAC system. The exact location and installation method may vary depending on the specific model of the dehumidifier and the layout of the home's HVAC system.