Product review (5 stars): Winter Moisture
There is nothing more frustrating than than having the dry air of winter made even more dry by the furnace heating and blowing more dry air.  The furniture drys up, skin cracks, and the shocks from static electricity are annoying and painful.  With a humidifier attached to the furnace, however, these frustrations can be a thing of the past.

The GeneralAire 990-13 replacement pad brought the moisture levels in my home back to a more normal range.  With moist air now circulating through the house, the thermostat does not need to be set as high to keep warm, the furniture doesn't feel like it's falling apart, dry cracked skin is now smooth, and static shocks are in the past.

These filters do a great job of getting moisture into the warm air from the furnace.