Break Free from Water Heater Rentals (Reliance & Enercare Buyout Savings)
Renting a water heater in Ontario costs $45 to $65/month ($5,400 to $7,800+ over 10 years). Purchasing your Navien NPE-240S2 directly breaks even in under 3 years and permanently eliminates monthly utility fees.
The premier high-efficiency condensing tankless water heater for direct tank replacements without an internal recirculation pump. Delivering up to 42.4 L/min (11.2 GPM) of domestic hot water at an outstanding 0.96 Uniform Energy Factor (UEF), the Navien NPE-240S2 provides identical condensing efficiency and dual stainless steel heat exchangers as the flagship A2 series at a substantially lower upfront equipment cost.
Technical specifications
| Warranty | Limited Warranty - 15-Year Heat Exchanger and 5-Year Parts (Residential) 8-Year Heat Exchanger and 5-Year Parts (Commercial) (full details of warranty terms available in the Navien manuals or website) Source: Navien warrantyWarranty is provided by the manufacturer under its own terms. See the source link for full details. |
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Key features
- 0.96 UEF condensing efficiency — dual commercial-grade stainless steel heat exchangers extract maximum latent heat, achieving top-tier ENERGY STAR efficiency.
- Direct tank-to-tankless replacement — engineered for homes with conventional plumbing runs or existing external recirculation loops, saving $630 in upfront hardware costs.
- 15:1 burner turndown ratio — intelligently modulates gas input from 13,300 to 199,900 BTU/h (3.9 to 58.6 kW) to precisely match hot water demand.
- Flexible 2-inch PVC venting — permits venting runs up to 22.9 m (75 ft) using 2-inch PVC, CPVC, or polypropylene pipe, or up to 45.7 m (150 ft) with 3-inch pipe.
- 1/2-inch gas line capability — compatible with existing 1/2-inch gas supply lines up to 7.3 m (24 ft) from the gas meter under Canadian gas code CSA B149.1.
- Compact lightweight cabinet — wall-mount chassis weighs just 67 lb, freeing up valuable mechanical room floor space.
Specifications
| Brand | Navien |
|---|---|
| Series | NPE-S2 (Standard Condensing) |
| Product type | Condensing tankless water heater (non-recirculating) |
| Maximum gas input | 199,900 BTU/h (58.6 kW) |
| Minimum gas input | 13,300 BTU/h (3.9 kW) |
| Uniform Energy Factor (UEF) | 0.96 |
| Maximum water flow | 11.2 GPM (42.4 L/min) |
| Continuous flow at 67 °F (37 °C) rise | 5.6 GPM (21.2 L/min) |
| Primary & secondary heat exchangers | Commercial-grade stainless steel |
| Venting diameter & max length | 2 in: up to 75 ft; 3 in: up to 150 ft (PVC/CPVC/PP) |
| Dimensions (W × H × D) | 17.3 × 27.4 × 11.4 in (43.9 × 69.6 × 29.0 cm) |
| Unit weight | 67 lb (30.4 kg) |
Before you buy
- Recirculation check: If your home has long plumbing runs (>50 ft to master bath) and you want instant hot water at the tap, choose the NPE-240A2 with ComfortFlow pump instead.
- Gas service capacity: Confirm incoming meter flow for 199,900 BTU/h; compatible with 1/2-inch lines up to 24 feet under CSA B149.1 calculations.
- Winter groundwater: In Ontario, winter groundwater drops to 4 °C (40 °F). At an 80 °F temperature rise, continuous delivery is 5.1 GPM, easily handling 2 simultaneous showers.
- Venting compliance: Must use certified ULC S636 PVC/CPVC or polypropylene venting terminating outside with proper snow clearance.
Documents
- Specification sheet — Navien NPE-2 Series (PDF)
- QuickFacts — Navien NPE-2 Series (PDF)
- Installation manual — Navien NPE-A2 / NPE-S2 (PDF)
- User's information manual — Navien NPE-2 Series (PDF)
- Product brochure — Navien NPE-A2 / NPE-S2 Series (PDF)
Specifications from Navien technical engineering documentation. Subject to manufacturer revisions.
Installation & Safety Notice: Condensing tankless gas water heaters must be installed and serviced by a licensed gas technician (TSSA certified in Ontario) in accordance with Navien installation specifications and Canadian fuel gas codes.
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.