Honeywell 17gpd By-Pass Humidifier with H8908A Humidistat• Humidifier pad is coated with AGION antimicrobial agent. • Preassembled for quicker installation. • Small footprint, light weight and reversible components allow for easy mounting on either warm air supply or cold air return of any forced air furnace. • Interior components designed for quick maintenance and service. • Option of automatic humidity control or standard humidistat. • Standard tested per ARI Standard 610.