Onsen 26L Indoor Natural Gas Tankless Water Heater
Onsen 26L Indoor Natural Gas Tankless Water Heater
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Onsen 26L Indoor Natural Gas Tankless Water Heater
High-capacity, continuous direct-vent natural gas hot water engineered for Canadian municipal connections, large family homes, and secondary suites.
Whole-Home Capacity
Supplies up to 6.87 GPM (26 L/min) on demand, easily powering 2–3 plumbing fixtures simultaneously.
Direct Vent Architecture
Sealed combustion pulls fresh exterior air and vents exhaust cleanly through standard 3" Category III ducting.
Precise Digital Controls
Front-mounted digital LED interface allows pinpoint temperature selection from 35°C to 60°C.
Certified Safety Standard
Full C-CSA-US certification approved for permanent residential indoor installations across Canada.
Z-Vent 3" Horizontal Vent Kit (Wall Vent)
Heavy-duty stainless steel components designed to vent flue exhaust through an exterior wall. Includes an appliance adapter with a built-in backflow preventer to safeguard internal piping against freezing in cold Canadian winters.
Onsen 3" Insulated Fresh Air Intake Kit
Draws clean outside combustion air to ensure balanced indoor air quality. Features 4–10 ft extendable ducting with thick fiberglass insulation and a flame-retardant Mylar vapor barrier to eliminate condensation and absorb duct vibration.
- Indoor Dedicated: Fully certified for indoor residential use. Must be vented strictly using approved 3" Category III stainless steel venting.
- Gas Supply Sizing: A 3/4-inch gas line is required to supply adequate natural gas volume for the 180,000 BTU burner under full flow demand.
- Combustion Air: Direct-vent installation requires bringing fresh combustion air into the burner via a 3" air intake duct.
- Tips & Tricks: The Cabin Depot was one of the first companies in Canada to offer specialized tankless water heaters. Check out our Tankless Water Heater Selection Guide for sizing and layout tips.
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