Takagi and Navien have different strengths.
Product comparison
| Takagi T-H3-DV-N | Navien NPE-240A2 | |
|---|---|---|
| BTU / GPM | 199k / 10.0 | 199k / 11.2 |
| Heat exchanger warranty | 15 years | 15 years |
| Buffer tank (cold-sandwich) | No | Yes (0.5 gal) |
| Built-in recirc | No | Yes |
| App | None | NaviLink |
| Typical price | $1,449-1,749 | $2,200-2,500 |
Navien wins on features: buffer tank for cold-sandwich, built-in recirculation, Wi-Fi app. Takagi undercuts by $700-1,000.
Combi boilers
Takagi doesn't make combi boilers. Navien NCB / NFC dominate residential combi.
When Takagi wins
- Price-sensitive — $700-1,000 savings vs NPE-A2
- You don't need buffer tank, built-in recirc, or app
- AO Smith / Takagi installer available
When Navien wins
- Cold-sandwich is your specific concern (NPE-A2 buffer tank)
- You need a combi boiler (only Navien)
- You want built-in recirculation
- You value features over savings
Bottom line
Navien is more feature-rich; Takagi is the value option. For combi boilers, only Navien.