The White-Rodgers HFT2100 whole house flow-thru humidifier includes the humidifier assembly with summer shutoff damper, the water panel, manual humidistat, self-piercing saddle valve, 6-Inch diameter collar, 24-Volt transformer and mounting screws. This flow-thru humidifier is the best choice for hard water as mineral deposits are flushed out. The HFT models require a drain. A wicking card and water distribution tray will compensate for non-level plenums. The HFT2100 is reversible and can be assembled with the 6-Inch bypass opening on the right or left side. The 6-Inch bypass duct is not included. The 1/4-Inch copper tubing and humidistat wire is not included. Overall Size 13-1/2H by 12-1/2W by 9-5/8-Inch. Plenum opening is 10-Inch H by 9-Inch W. For a tight home with 2100 square feet. White-Rodgers is a business of Emerson Climate Technologies, the world's leading provider of heating, ventilation, air conditioning, and refrigeration solutions for residential, industrial, and commercial applications. Combining technically superior products and services from industry-leading companies and brands with global engineering, design, distribution, installation, and monitoring capabilities help Emerson Climate Technologies to create reliable, energy efficient climate systems that improve human comfort, safeguard food, and protect the environment.