Whole house humidifier installation involves integrating the humidifier system into the central heating and cooling ductwork. It requires the expertise of HVAC technicians and plumbers to install and maintain key components like ductwork, evaporator pads, drain lines, and hygrometers. The choice of humidifier type (evaporative, steam, ultrasonic) depends on factors such as air quality needs, house size, and existing HVAC system. Proper maintenance and regular water source monitoring ensure efficient humidifier operation. Considerations for installation include electrician involvement, homeowner knowledge, environmental factors, cost implications, and adherence to guidelines set by regulatory bodies like the EPA and ASHRAE.