Product review (5 stars): Save energy, warm your house, make it smell nice too
In cold weather you spend a lot of money heating and humidifying the air in your house so why would you take the warm, moist air from the dryer and pump it outside?  Add some water to this unit and it'll catch all of the lint from the dryer's exhaust and it'll fill your house with warm air that smells like fresh laundry.  Honestly I was skeptical of the lint-catching but there's no extra dust (aka: lint) in our laundry room since we started using this so we give it eight enthusiastic thumbs up.