Onsen 3" Insulated Fresh Air Intake Kit

The Onsen 3" Insulated Fresh Air Intake Kit provides the components needed to supply outside combustion air to Onsen 14L and 26L Indoor Tankless Water Heaters. Designed for reliable indoor installations, this kit helps ensure proper airflow and efficient heater operation.

The expandable aluminum intake pipe extends from 4 to 10 feet and is wrapped in thick fiberglass insulation with a flame-retardant Mylar vapour barrier for added thermal protection and durability. Its lightweight, self-supporting design helps maintain consistent air temperatures while reducing vibration and air leakage.

Certified to ULC-S110 and UL-181 Class 1 standards, the insulated ducting delivers an airtight and dependable fresh air intake solution.

Kit Includes

• 3" Diameter Expandable Aluminum Pipe (4–10 ft)
• Insulated Mylar Vapour Barrier
• 3" Diameter x 11.75" Termination Hood
• 2 Gear Clamps