Takagi T-H3S-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater, 8-Gallon Per Minute Endless hot water, On-demand usage, Compact, Space saving, Energy conservation Computerized safety features, No pilot light to have to worry about Satisfies the 2012 SCAQMD Rule 1146.2 for Ultra-Low NOx Emissions Dimension:22.5"H x 17.75"W x 10.75"D