CTD1500C
U.S. Boiler Company · Commercial Boiler
ENERGY STAR CertifiedCommercial Boilers →
Thermal Efficiency
96%
Input Rate
1500MBTU/hr
Turndown Ratio
10.00
Application
Indoor
Low thermal eff
U.S. Boiler Company CTD1500C: thermal eff 96%, lower than 83% of commercial boilers (category median 96.5%).
Thermal eff: worse than 91% of the 36 comparable models within 10% of this size. Their median is 96.2 %.
Where this model sits
Input1500MBTU/hr
300median 7502500
Thermal Eff96%
94median 96.598.7
Lower than 83% of commercial boilers.
The U.S. Boiler Company CTD1500C is a 1500 MBTU/hr commercial boiler. At 96 % it ranks in the bottom 17% of the 386 certified commercial boilers models. Among similar-sized commercial boilers (within 10% of its size), it is less efficient than the peer median of 96.2 %.
Specifications
| Performance | |
|---|---|
| Thermal Efficiency | 96% |
| Full-Load Input Rate | 1500MBTU/hr |
| Turndown Ratio | 10.00 |
| Configuration | |
| Application | Indoor |
| Control Type | Multi-stage |
| Model Name | Citadel |
| Identifiers | |
| Model Number | CTD1500C |
| ENERGY STAR ID | ES_1141425_CTD1500C_05222026010201_10218465732 |
| Partner | Thermal Solutions Products LLC |
| Date Qualified | 2026-08-04 |
| Available From | 2025-09-01 |
| Markets | United States, Canada |
Documentation
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