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Onsen 3" Horizontal Vent Kit

Name: Onsen 3" Horizontal Vent Kit
Brand: Onsen
SKU: NE37003A
Availability: BackOrder

Proveedor: Onsen

SKU: NE37003A

$449.00 CAD

Envío calculado al finalizar la compra.

Premium Z-Vent stainless steel exterior wall venting with built-in freeze protection, engineered to safely exhaust combustion flue gases in cold northern climates.

Built-In Freeze Guard

Integrated backflow damper keeps freezing outdoor air from entering the heater and bursting internal pipes.

Acid-Resistant Stainless

Crafted from premium AL-294C super-ferritic stainless steel to withstand corrosive flue condensation for decades.

Safe Wall Pass-Through

Includes an insulated wall thimble, 90° elbow, extension pipes, and hooded termination cap for a complete setup.

Certified & Guaranteed

UL and cUL listed for Category II, III, and IV gas appliance venting, backed by a 15-year limited manufacturer warranty.

Technical Specifications

Model SKU NE37003A (2ZVEWD03A)

Brand Fitment Onsen 14L & 26L Indoor

Duct Diameter 3" (76 mm)

Warranty Scheme 15-Year Limited

Vent Material AL-294C Stainless Steel

Vent Category Category II, III, IV

Wall Passage Included Wall Thimble

Standards / Certs UL / cUL Listed

Orientation Horizontal (Side Wall)

What's in the Box

Appliance Adapter w/ Backflow Preventer 1x 3-in. stainless adapter with cold-climate damper

90-Degree Vent Elbow 1x 3-in. directional bend pipe

Straight Vent Pipes 1x 1-ft pipe & 1x 1.5-ft pipe (adjustable reach)

Combustible Wall Thimble 1x 3-in. safe wall penetration sleeve

Outdoor Termination Hood 1x 3-in. exterior hooded exhaust cap

Important Installation Notes

Why Freeze Protection Matters: In cold Canadian winters, sub-zero winds can blow back down an open exhaust flue and freeze the water inside your heater's copper heat exchanger. The built-in backflow preventer flapper closes automatically when the unit isn't running to stop cold drafts.
Acidic Exhaust Resistance: Gas combustion creates acidic condensate that eats through standard stainless steel. Premium AL-294C alloy is engineered specifically to withstand these acids without pitting or pinholing.
Slope & Snow Clearance: Install horizontal vent pipes with a slight downward pitch away from the water heater to drain moisture, and mount the outside hood well above your area's maximum expected winter snowline.
Tips & Tricks: Check out our Tankless Water Heater Selection Guide for sizing, layout, and venting guidelines.

Compatible Onsen Heaters

14L Indoor Series

14L Indoor Propane → 14L Indoor NG →

26L Indoor Series

26L Indoor Propane → 26L Indoor NG →

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