Rheem is the broad-line US specialist (tank, electric, hybrid, tankless). Navien focuses on tankless and combi-boilers. For tankless and combi specifically:
Tankless: NPE-A2 vs RTGH-95DVLN
| Navien NPE-240A2 | Rheem RTGH-95DVLN | |
|---|---|---|
| Heat exchanger warranty | 15 years | 12 years |
| Built-in recirc pump | Yes (A2) | No (external only) |
| Buffer tank | Yes (0.5 gal) | No |
| Wi-Fi app | NaviLink (good) | EcoNet (multi-product, less tankless-focused) |
| Typical price | $2,200-2,500 | $1,650-1,950 |
Rheem RTGH significantly undercuts Navien NPE-A2 — about $400-600 difference. Navien wins on features (buffer tank, built-in pump, longer warranty). Decision: do those features justify the price gap?
Combi boilers
Rheem doesn't have a strong combi-boiler line. For combi (hydronic heat + DHW from one unit), Navien is the clearly better answer — Rheem competes here mostly through its commercial line which is overkill for residential.
Software
- Navien NaviLink: tankless-focused, decent in current generation
- Rheem EcoNet: covers all Rheem products (HVAC + water). Functional but less polished for the tankless use case
About even depending on whether you use other Rheem products.
Installer network
- Rheem: wider plumber network overall (because Rheem covers all categories)
- Navien: NSS network is specialized but smaller
For combi boilers, find an NSS or hydronics specialist regardless of brand.
When to buy Navien
- You want the buffer tank for cold-sandwich
- You need a combi boiler — only real choice
- You want built-in recirculation pump and don't want external Grundfos
- You value the longer (15-year vs 12-year) heat exchanger warranty
When to buy Rheem
- Price-sensitive — $400-600 difference matters
- You don't need built-in recirc or buffer tank
- You use other Rheem equipment and want EcoNet integration
- Your installer is Rheem-experienced
Bottom line
Navien is the better tankless on features. Rheem is the better deal. For combi boilers, Navien wins decisively.