Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Navien · Series
The NPN-E is the exterior half of Navien's non-condensing NPN tankless water heater line — NPN-160E, NPN-180E and NPN-199E, rated 0.81 UEF with the same 10,700 BTU/h minimum fire and 55–60 lb cabinet as the universal NPN-U. It is a DHW-only water heater, not a boiler.
Series facts
The NPN-E is the outdoor (exterior) version of Navien's non-condensing NPN tankless water heater: the same 0.81 UEF stainless-steel NaviTech platform as the NPN-U, packaged for wall-hung outdoor installation. Like the rest of the NPN family it produces domestic hot water only, and Navien's launch materials position the series as a lower-cost, non-condensing alternative to the NPE line with recirculation control built into the circuit board.
Three E sizes mirror the U line: NPN-160E fires 10,700 to 160,000 BTU/h with 7.6 GPM maximum flow at a 35°F rise; NPN-180E fires 10,700 to 180,000 BTU/h with 8.5 GPM; and NPN-199E fires 10,700 to 199,900 BTU/h with 9.5 GPM. All three share the 14.0" W × 23.0" H × 9.3" D cabinet, weigh 55 lb on the 160E and 60 lb on the larger two, and connect on 3/4" water and gas lines per the product pages.
The NPN-E pages are on navieninc.com; the NPN launch press release also appears on navieninc.ca, but no Canadian availability statement was found on the product pages, so Canadian availability is recorded as unknown. Where a home needs space heating as well as hot water, Navien's combi boilers (NCB-H, NFC-H) are the boiler products, and the NPN-E can be cascaded with other NPN units for larger DHW loads.
Highlights
Models
One canonical page per model with input, output and efficiency kept separate.
Navien
The Navien NPN-160E is a non-condensing tankless water heater — a DHW-only appliance, not a boiler — firing 10,700 to 160,000 BTU/h at 0.81 UEF with up to 7.6 GPM at a 35°F rise.
Navien
The Navien NPN-180E is a non-condensing tankless water heater — a DHW-only appliance, not a boiler — firing 10,700 to 180,000 BTU/h at 0.81 UEF with up to 8.5 GPM at a 35°F rise.
Navien
The Navien NPN-199E is a non-condensing tankless water heater — a DHW-only appliance, not a boiler — firing 10,700 to 199,900 BTU/h at 0.81 UEF with up to 9.5 GPM at a 35°F rise.
| Specification | Navien NPN-160E | Navien NPN-180E | Navien NPN-199E |
|---|---|---|---|
| Input, minimum | 10.7 MBH | 10.7 MBH | 10.7 MBH |
| Input, maximum | 160 MBH | 180 MBH | 199.9 MBH |
| output-max | — | — | — |
| afue | — | — | — |
| turndown | — | — | — |
| vent-max-3 | — | — | — |
| vent-max-2 | — | — | — |
| Weight | 55 lb | 60 lb | 60 lb |
Read the full comparison: Navien NPN-160E vs NPN-199E →
Read the full comparison: Navien NPN-160E vs Navien NPN-180E →
Read the full comparison: Navien NPN-180E vs Navien NPN-199E →
Error codes and alerts
No alerts documented for this series yet.
Manuals
Where ROMA provides on-site service
On-site service is currently offered in Greater Vancouver, BC, including Vancouver, Burnaby, Richmond, Surrey, Coquitlam, North Vancouver, West Vancouver, New Westminster, Port Coquitlam, Port Moody, Delta, Langley, Maple Ridge, Abbotsford, Chilliwack, White Rock, Pitt Meadows, Tsawwassen, Anmore, Lions Bay, Belcarra, Bowen Island, Mission. Everything else on this site is reference information you can use anywhere in Canada.
Services for Navien boilers
They are the same non-condensing platform: the U (universal) models install indoors or outdoors, while the E (exterior) models are configured for outdoor wall-hung installation. Ratings, cabinet dimensions and flow are the same.
No. It is a non-condensing tankless water heater for domestic hot water only. Navien's combi boilers are the NCB-H and NFC-H series; a home needing heating plus hot water from one appliance needs a combi, not an NPN-E.
Yes. Navien's launch materials state the NPN series has cascade capability with other NPN units and recirculation control on board; the NPN installation manual covers the manifold configurations and clearances a licensed installer must follow.
Describe what the boiler is doing and get a straight answer about the next step.
On-site service in Greater Vancouver, BC. ROMA lists “Open 7 days” on its site; call to confirm same-day availability.
Sources and verification
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.