Standard Features - For homes up to 4,000 square feet - Water-saving Technology - Uses 30% less water than standard models - Easy mounting on either warm air supply or return air duct of any forced-air furnace - Flow Through Design - Helps keep unit clean of microorganisms and decreases the frequency of maintenancev - PerfectFLO Water Distribution - Optimizes efficiency and water usagev - Protects wood floors and furnishings from drying and cracking - Reduces static electricity - Saves Money and Energy - Because the improved humidity makes for a more comfortable home, the thermostat can be turned down a few degrees - Installation Kit Included - Fewer duct connections and less wiring eases installation process - Online installation video available - Drain is required - Easy-to-use humidity control included - 1-year warranty