The industry benchmark for commercial-grade durability and the lowest warranty service complaint rate among condensing tankless water heaters. The Rinnai SENSEI™ RU199i delivers an endless supply of hot water at up to 11.0 GPM with a 0.96 Uniform Energy Factor (UEF), engineered with dual stainless steel heat exchangers and whisper-quiet operation for Canadian homes.
Technical specifications
| Warranty | Residential Applications: Heat Exchanger 15 Years All Other Parts and Components 5 Years Reasonable Labor 5 Years For residential applications, the heat exchanger warranty is 15 years or 12,000 operation hours, whichever occurs first. For residential applications, the product must be registered within 90 days of installation or Labor Warranty defaults to 1 year. Source: Rinnai warrantyWarranty is provided by the manufacturer under its own terms. See the source link for full details. |
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Key features
- Lowest failure & service complaint rate — proven SENSEI architecture with heavy-duty stainless steel heat exchangers and robust flame sensing.
- 0.96 Uniform Energy Factor (UEF) — extracts latent heat from exhaust flue gases for maximum energy efficiency, reducing household natural gas consumption.
- High flow capacity — delivers up to 11.0 GPM (42 L/min) maximum flow, comfortably maintaining 5.5 GPM continuous output during steep 39 °C (70 °F) winter temperature rises.
- Circ-Logic™ recirculation intelligence — onboard cycling logic communicates directly with an optional external recirculation loop or pump to ensure rapid hot water delivery.
- Whisper-quiet operation — insulated cabinet and modulating draft fan keep operating sound down to a quiet 48 dB(A).
- Versatile venting architecture — supports 2-inch or 3-inch PVC, CPVC, polypropylene, or concentric venting with runs up to 46 m (150 ft).
Specifications
| Brand | Rinnai |
|---|---|
| Series | SENSEI™ Super High Efficiency Plus |
| Product type | Indoor condensing tankless water heater |
| Maximum gas input | 199,000 BTU/h (58.3 kW) |
| Minimum gas input | 15,000 BTU/h (4.4 kW) |
| Uniform Energy Factor (UEF) | 0.96 |
| Domestic hot water flow rate (max) | 11.0 GPM (41.6 L/min) |
| Continuous flow at 70 °F (39 °C) rise | 5.5 GPM (20.8 L/min) |
| Primary & secondary heat exchangers | Commercial-grade 316L stainless steel |
| Sound level | 48 dB(A) |
| Venting options | 2 in (up to 65 ft) or 3 in (up to 150 ft) PVC/CPVC/PP/Concentric |
| Dimensions (H × W × D) | 31.3 × 18.5 × 11.5 in (79.5 × 47.0 × 29.0 cm) |
| Unit weight | 64 lb (29.0 kg) |
Before you buy
- Gas supply verification: Ensure your natural gas meter or propane supply regulator delivers adequate flow for 199,000 BTU/h; compatible with 1/2-inch lines up to 24 feet under CSA B149.1.
- Cold-climate groundwater: At an 80 °F winter temperature rise (heating 40 °F water to 120 °F), continuous delivery is 5.1 GPM, ideal for running 2 simultaneous showers.
- Dedicated venting: Must use certified ULC S636 PVC/CPVC or polypropylene venting terminating outside with proper snow clearances.
- Condensate disposal: Requires dedicated drain line with inline condensate neutralizer kit.
Documents
- Installation and operation manual — Rinnai SENSEI N-Series (PDF)
- Technical bulletin — SENSEI approved venting and clearances (PDF)
Specifications from Rinnai SENSEI Series technical documentation (Form 100000467). Subject to manufacturer revisions.
Installation & Safety Notice: High-efficiency gas tankless water heaters require installation by a licensed gas fitter (TSSA certified in Ontario) adhering to Rinnai direct-vent guidelines and local fuel safety regulations.
Common questions
Is installation included?
No. AVL Shop sells equipment only. Installation is done by an independent licensed contractor that you hire.
How is freight charged?
Freight cost is included in your written quote before you pay.
What warranty does this product have?
The manufacturer warranty applies. Where we have the manufacturer’s exact wording, it is shown in the Warranty row of the specifications on this page, with a link to the source.
How do I get a quote?
Use Request a quote on this page and send the model and your city or postal code.