Navien NFB700-800CvsNTI TFTN850
Side-by-side commercial boiler comparison
Navien NFB700-800C
Thermal Efficiency
97.5%
Input Rate
799MBTU/hr
Turndown Ratio
12.00
Application
Indoor
NTI TFTN850
Thermal Efficiency
97%
Input Rate
850MBTU/hr
Turndown Ratio
10.00
Application
Indoor
Key differences
Both models are closely matched on thermal eff: 97.5 vs 97.0 %. The NTI TFTN850 is larger at 850 MBTU/hr versus 799 MBTU/hr. Overall, the Navien NFB700-800C sits higher in the category, ranking above 84% of certified commercial boilers.
Performance
| Spec | Navien | NTI |
|---|---|---|
| Thermal Efficiency(%) | 97.5 | 97 |
| Full-Load Input Rate(MBTU/hr) | 799 | 850 |
| Turndown Ratio | 12.00 | 10.00 |
Configuration
| Spec | Navien | NTI |
|---|---|---|
| Application | Indoor | Indoor |
| Control Type | Multi-stage | Multi-stage |
| Model Name | NFB700-800C | TFTN |