NPE180S2
Navien 150,000 BTU
8.4 GPM
Tankless Water Heater
The Navien NPE S2 series is a premium condensing tankless platform built for efficient, on-demand domestic hot water with a clean, code-true install.
NPE180S2 is a common “sweet spot” for many Ottawa homes when you want strong shower performance and better simultaneous capability without jumping to the largest input class. It’s often a good match for typical family usage where two fixtures may overlap, depending on actual flow rates.
The common mistake is assuming the model number guarantees unlimited simultaneous hot water regardless of season or fixture flow. We verify gas pipe sizing and available BTU, confirm venting feasibility, and sanity-check your expected simultaneous draws so you don’t end up with performance expectations the layout can’t support.
We confirm sizing and pricing on site – no pressure, no upsells.
Installed in Ottawa and surrounding areas by Peak Comfort HVAC
Specs for the NPE180S2
- System type: Gas-fired, condensing, tankless, wall-hung (forced draft direct vent)
- Fuel compatibility: Natural gas or propane (LP conversion kit required)
- Installation type: Indoor or Outdoor (with approved outdoor vent kit)
- Efficiency (UEF): 0.96
- Input range (BTU/h): 10,000–150,000
- Max DHW flow @ 35°F rise: 8.4 GPM
- Max DHW flow @ 67°F rise: 4.4 GPM
- Hydraulic range: Minimum flow 0.5 GPM; water pressure 15–150 PSI
- Gas supply pressure (in. w.c.): NG 3.5–10.5; LP 8–13
- Venting: Forced draft direct vent; 2 in or 3 in PVC/CPVC/approved polypropylene/stainless; 0 in vent clearance to combustibles
- Connection sizes: Hot 3/4 in NPT; Cold 3/4 in NPT; Gas 3/4 in; Air intake 2 in; Exhaust 2 in
- Physical (W×H×D; weight): 17.3 in × 27.4 in × 13.2 in; 68 lbs
Technical documents
Key features of the NPE S2 family
What it is:
- Premium condensing tankless platform for on-demand DHW
- Dual stainless steel heat exchangers for efficiency and durability
Comfort & operation
- Up to 15:1 turndown ratio (model-dependent input range)
- Advanced control panel with setup wizard and diagnostics
Build & serviceability
- Forced draft direct vent design with 0 in clearance to combustibles (venting)
- Compatible with common accessory options (valve sets, controllers, condensate neutralizer)
Install + ownership notes
- Natural gas or propane capable (conversion kit required; qualified installer)
- Designed for indoor installs, or outdoor installs with the correct kit and conditions
Want to see if this tankless is the right fit?
We’ll confirm your real hot-water demand, gas capacity, and venting path—then quote the cleanest install that fits.
Get in Touch
Office Address:
275 Montfort St, Ottawa
ON K1L 5N8
Servicing: Ottawa, Orleans, Nepean, And the surrounding areas
Phone:
E-Mail:
info@peakcomfort.ca
Quick Contact
Email: info@peakcomfort.ca
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