Canada-wide water heater information · On-site service in Metro Vancouver, BC
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Navien · Series
Navien's NPE-S2 series is the current-generation condensing tankless range listed on Navien's Canadian site in three sizes (NPE-180S2, NPE-210S2, NPE-240S2): wall-hung forced-draft direct-vent units with UEF 0.96 and flow ratings published at 35, 45 and 67 °F rises.
Series facts
UEF 0.96 on natural gas and propane for the S2 series per Navien's product pages. Draw patterns are not printed on the pages.
The NPE-S2 is Navien's current S-generation condensing tankless platform, listed on the Canadian site alongside the NPE-A2 series. The three Canadian sizes share one cabinet (17.3 in wide, 27.4 in high, 13.2 in deep), electronic ignition, 3/4 in connections, 120 V operation and forced-draft direct venting in 2 in or 3 in approved pipe, and differ in input and deliverable flow.
Navien publishes each S2 model's flow at three temperature rises rather than a single maximum, and this site reproduces those rises so capacity is never compared across different rise figures. In Metro Vancouver winter, when the rise to a 49 °C shower approaches 40 °C (72 °F), the flow at the 45 °F and 67 °F ratings is the honest sizing basis.
The Canadian terms of Navien's residential warranty are confirmed from Navien's Canadian warranty documents before any claim is made here. Whether CANRO stocks a given NPE-S2 model for a job is confirmed at consultation.
Highlights
Models
One canonical page per model. Capacity and fuel variants stay on that page.
Navien · Gas tankless
The Navien NPE-240S2 is the largest of Navien's current S2 condensing tankless models: 13,300–199,900 BTU/h on natural gas or propane, UEF 0.96, and published flows of 11.2 GPM at a 35 °F rise and 5.8 GPM at a 67 °F rise.
Navien · Gas tankless
The Navien NPE-210S2 is the middle of Navien's current S2 condensing tankless models: 12,000–180,000 BTU/h on natural gas or propane, UEF 0.96, and published flows of 10.1 GPM at a 35 °F rise and 5.3 GPM at a 67 °F rise.
Navien · Gas tankless
The Navien NPE-180S2 is the smallest of Navien's current S2 condensing tankless models: 10,000–150,000 BTU/h on natural gas or propane, UEF 0.96, and published flows of 8.4 GPM at a 35 °F rise and 4.3 GPM at a 67 °F rise.
| Specification | Navien NPE-240S2Gas tankless | Navien NPE-210S2Gas tankless | Navien NPE-180S2Gas tankless |
|---|---|---|---|
| Minimum gas input | 13,300 BTU/h | 12,000 BTU/h | 10,000 BTU/h |
| Maximum gas input | 199,900 BTU/h | 180,000 BTU/h | 150,000 BTU/h |
| Uniform Energy Factor (UEF) | 0.96 | 0.96 | 0.96 |
| flow-max | — | — | — |
| Minimum flow rate | 0.5 GPM (1.9 L/min) | 0.5 GPM (1.9 L/min) | 0.5 GPM (1.9 L/min) |
| vent-2in | — | — | — |
| Weight | 73 lb (33.1 kg) | 73 lb (33.1 kg) | 68 lb (30.8 kg) |
“—” means not applicable to that system type or not published by the manufacturer. Flow figures are only comparable at the same temperature rise; UEF values are only comparable within the same draw pattern.
Fault codes
No codes documented for this series yet.
Manuals
Where CANRO provides on-site service
On-site service is currently offered across Metro Vancouver: Vancouver, Burnaby, Richmond, Surrey, Coquitlam, North Vancouver, West Vancouver, New Westminster, Delta, Langley, Port Moody, Port Coquitlam, Maple Ridge, Pitt Meadows, White Rock, Tsawwassen; plus Anmore, Belcarra, Lions Bay, Bowen Island, Abbotsford with travel or ferry arrangements confirmed by phone. Everything else on this site is reference information you can use anywhere in Canada.
Services for Navien gas tankless units
The S2 is Navien's current S-generation platform: the Canadian pages list it at UEF 0.96 against the A2's 0.95, with slightly higher flow at the 67 °F rise on the largest size. Both are current in the Canadian listing as of the verification date.
Yes. Navien's Canadian site lists the NPE-S2 series (NPE-180S2, NPE-210S2, NPE-240S2) among its residential water heaters.
Navien publishes flow at specific temperature rises (for example 11.2 GPM at a 35 °F rise on the NPE-240S2). This site always shows the rise with the flow figure.
Describe what the water heater is doing and get a straight answer about the next step.
On-site service in Metro Vancouver, BC. Call to check availability.
Sources and verification
Facts checked September 7, 2026. Last updated September 7, 2026. Technical reviewer: not yet assigned.