Navien NFB700-500CvsVelocity Boiler Works PHX500C-O
Side-by-side commercial boiler comparison
Navien NFB700-500C
Thermal Efficiency
97.5%
Input Rate
499MBTU/hr
Turndown Ratio
12.00
Application
Indoor
Velocity Boiler Works PHX500C-O
Thermal Efficiency
97%
Input Rate
500MBTU/hr
Turndown Ratio
10.00
Application
Outdoor
Key differences
Both models are closely matched on thermal eff: 97.5 vs 97.0 %. The Velocity Boiler Works PHX500C-O is larger at 500 MBTU/hr versus 499 MBTU/hr. Overall, the Navien NFB700-500C sits higher in the category, ranking above 84% of certified commercial boilers.
Performance
| Spec | Navien | Velocity Boiler Works |
|---|---|---|
| Thermal Efficiency(%) | 97.5 | 97 |
| Full-Load Input Rate(MBTU/hr) | 499 | 500 |
| Turndown Ratio | 12.00 | 10.00 |
Configuration
| Spec | Navien | Velocity Boiler Works |
|---|---|---|
| Application | Indoor | Outdoor |
| Control Type | Multi-stage | Multi-stage |
| Model Name | NFB700-500C | Phantom-XL |