What is a Flow-Through Humidifier?
A flow-through humidifier, also known as a bypass humidifier or a wetted media humidifier, is installed directly to your HVAC system. Once installed onto the furnace ductwork, dry air is forced across moist evaporator pads, which delivers an ultra-fine mist of much-needed moisture throughout the entire home. However, the drawback of using a flow-through humidifier is that that in order to get the maximum efficiency from these units, the furnace fan must be operating constantly. Since the humidifier relies on the furnace fan, if no air is flowing through your HVAC system, then no moisture is being delivered throughout your home either. For example, a flow-through humidifier that is rated for 18 gallons per day is installed onto a furnace system that is only running 8 hours a day, will actually only deliver 5.8 gallons of humidity per day.
