Description
The NPE-S2 heats water only when you ask for it, so nothing sits in the basement reheating the same tank of water overnight. Dual stainless steel heat exchangers and 2″ venting are what let it outperform larger non-condensing units.
Which size fits your home
Your technician measures fixture count and how much can run at once, then sizes the unit. These are the typical starting points.
| Model | Heat input | UEF | Flow at 67°F rise | Typically sized for |
|---|---|---|---|---|
| NPE-150S2 | 18,000 – 120,000 BTU/h | 0.93 | 3.4 GPM | About 2 people |
| NPE-180S2 | up to 150,000 BTU/h | 0.96 | 4.3 GPM | About 3 people |
| NPE-210S2 | up to 180,000 BTU/h | 0.96 | 5.3 GPM | 3 to 5 people |
| NPE-240S2 | 13,300 – 199,900 BTU/h | 0.96 | 5.8 GPM | 4 to 6 people |
Flow rates are quoted at a 67°F temperature rise, which is the realistic winter figure for Calgary. The same unit delivers considerably more at a milder rise.
How it works
- Dual stainless steel heat exchangers
- Field-convertible gas system (natural gas or propane)
- Low NOx emissions (20 ppm)
- Venting in 2″ or 3″ PVC, CPVC, approved polypropylene or stainless steel — up to 60′ on 2″, up to 150′ on 3″
- Backlit EZNav™ control panel with self-diagnostics, showing temperature, flow rate and cascade status, switchable between °F and °C
- Ready-Link® cascading up to 32 units — at 80% capacity the next unit starts, and the system balances the workload across units
- Common venting up to 12 units, which reduces building penetrations
Warranty
- 15 years on the heat exchanger
- 5 years on parts
- 1 year on labour
What the installation covers
- Removal and disposal of your existing water heater
- Supply and installation of the new tankless system
- All appropriate exhaust, combustion make-up air, gas, electrical and control connections
- System commissioning, start-up and testing to the manufacturer's requirements
- A walk-through so you know how to run it before we leave
- Application, inspection and completion of the municipal gas permit
You are responsible for calling the municipality to arrange the in-home inspector visit; we handle the permit itself.
Before you book
We inspect within reason and assume normal chimney conditions — a straight, clean drop from crown to base so a properly sized liner slides down easily. Offsets, jagged blocks, structural supports, stray screws, damage or misaligned sections can rule out a liner or increase the materials and labour needed. If that happens you are told before any work continues, and you decide how to proceed.
An ENERGY STAR certified tankless water heater uses 30% less energy on average than a storage tank type.
