Velocity Boiler Works PHX1000LvsViessmann CI2-1000
Side-by-side commercial boiler comparison
Velocity Boiler Works PHX1000L
Thermal Efficiency
97%
Input Rate
999MBTU/hr
Turndown Ratio
9.00
Application
Indoor
Viessmann CI2-1000
Thermal Efficiency
97.7%
Input Rate
1000MBTU/hr
Turndown Ratio
10.00
Application
Indoor
Key differences
Both models are closely matched on thermal eff: 97.0 vs 97.7 %. The Viessmann CI2-1000 is larger at 1000 MBTU/hr versus 999 MBTU/hr. Overall, the Viessmann CI2-1000 sits higher in the category, ranking above 88% of certified commercial boilers.
Performance
| Spec | Velocity Boiler Works | Viessmann |
|---|---|---|
| Thermal Efficiency(%) | 97 | 97.7 |
| Full-Load Input Rate(MBTU/hr) | 999 | 1000 |
| Turndown Ratio | 9.00 | 10.00 |
Configuration
| Spec | Velocity Boiler Works | Viessmann |
|---|---|---|
| Application | Indoor | Indoor |
| Control Type | Multi-stage | Multi-stage |
| Model Name | AMP | CI2-1000 |