MEDIUM-CAPACITY  RECIRCULATING HUMIDIFIERS  /    Humidifiers A Recirculating Humidifier can Foster a Comfortable Night’s Sleep in Dry, Winter Months   Model 1100 2.5-Gallon Recirculating Humidifier Model 1115 3.0-Gallon Recirculating Humidifier Model 1120 4.0-Gallon Recirculating Humidifier