As an Amazon Associate, we earn from qualifying purchases. A.O. Smith . 100123321 A.O. Smith . 100123321 Gallery Attributes Brand name, Manufacturer name, ManufacturerA.O. Smith Attribute0084.00 Attribute010.94 Attribute02ANSI Z21.10.3 Attribute03Commercial Attribute04240000 Attribute05For Sale in CA Attribute06CSA 4.3 Attribute07, Attribute13, Attribute31No Attribute088-7/8 in Attribute09Low Nox Attribute10, Attribute11, Attribute12NPT Attribute149 gpm Attribute154 Attribute16Propane Attribute1723-5/8 in Attribute18150 Attribute19, Attribute25, Attribute28Yes Attribute20Electronic Ignition Attribute21Indoor/Outdoor Attribute22Wall Mount Attribute23240 Attribute24Copper, Stainless Steel Attribute26Single Phase Attribute27Gas Attribute293/4 in Attribute30Up to 194 Deg F Attribute32Direct Vent Attribute33, Voltage120V Attribute34Tankless Attribute3518-1/2 in AttributeKey00AFUE AttributeKey01AMP AttributeKey02ANSI Specifications AttributeKey03Application AttributeKey04BTU AttributeKey05CEC Compliant AttributeKey06CSA Certified AttributeKey07Condensing AttributeKey08, length_AttribDepth AttributeKey09Emission AttributeKey10End Connection 1 AttributeKey11End Connection 2 AttributeKey12End Connections AttributeKey13Energy Star Compliant AttributeKey14Flow Rate AttributeKey15Flue Size AttributeKey16Fuel Type AttributeKey17, height_AttribHeight AttributeKey18High Pressure AttributeKey19IAPMO Listed AttributeKey20Ignition System AttributeKey21Indoor Outdoor AttributeKey22Installation Type AttributeKey23MBH AttributeKey24Material AttributeKey25NSF Certified AttributeKey26Phase AttributeKey27Power Source AttributeKey28SCAQMD Compliant AttributeKey29Supply Pipe Connection AttributeKey30Temperature Range AttributeKey31UL Listed AttributeKey32Vent Type AttributeKey33Volts AttributeKey34Water Heater Type AttributeKey35, width_AttribWidth DimensionUnitinch depth, length8.875 height23.625 moq, multiple1 MPN100123321 qtyInStockCall for Availability SKU4125012 width18.5 Distributor offers SellerSKUMOQIn stockMultiplePrices ferguson.com41250121Call for Availability1