Onsen 26L Indoor Gas Tankless Water Heater (w/ Installation Kit)

The Onsen 26L Indoor Gas Tankless Water Heater delivers instant hot water with higher heating power and increased flow capacity, making it ideal for 2-bath family homes, townhouses, and cottages. CSA certified for indoor installation in Canada and the USA, the 26L is also well-suited for 1-bath homes that require extra performance when running multiple fixtures at the same time, especially in colder climates. Compact indoor design: direct-vent system supports installation in restricted spaces Electronic ignition (120V): no pilot light, powered by a standard household outlet Easy temperature control: LED display with three preset heating modes Energy savings: operates only when hot water is needed Certified for indoor use: CSA approved for Canada and the USA Professional-grade venting (included): Z-Vent 3" Category III stainless steel wall vent kit, UL 1738 & ULC-S636 certified, engineered to withstand high-acid exhaust condensate that can prematurely deteriorate standard metal venting Insulated air intake kit (included): UL-181 Class 1 & ULC-S110 certified insulated air intake duct supplies combustion air from outdoors, helping maintain temperature stability, reduce condensation, and limit vibration What’s included: Onsen 26L Indoor Gas Tankless Water Heater Z-Vent 3" Category III Stainless Steel Wall Vent Kit Termination hood 90° elbow Wall thimble 12" straight pipe 18" straight pipe Appliance adapter with backflow preventer Insulated Fresh Air Intake Kit UL-181 Class 1 & ULC-S110 certified insulated aluminum intake duct (4–10 ft extendable) Important notes For indoor use only. Available in Propane or Natural Gas versions. Units are factory-set and cannot be converted between gas types. Gas Supply Line: A ¾-inch gas supply line is recommended to ensure sufficient propane flow to the unit. While a ½-inch line may work on very short pipe runs, it is not recommended for optimal performance. Not suitable for: hydronic, closed-loop, recirculating, or floor-heating systems.