The GH32W is the correct filter pad replacement for the following models:
The GH32W is a compatible equivalent of the Green Humidifier GH3200 Filter Pad Replacement. This humdifier pad filter provides whole house humidification through air furnace systems. This humidifier water pad features reinforced paper construction that results in a higher water-holding capacity and the output of 50% more moisture than metal pads. For optimum performance it is recommended that these water panels be replaced twice each season.
With this replacement filter pad you will be able to use your Bestair Pro GH3200 at its full capacity, enabling whole house humidification with ease. The filter allows for water to flow across the antimicrobial pad and then humidify the air, and then finally out of the drain.