| Product Program Category |
| Imaging Equipment |
Imaging Equipment |
| Type |
| Printers |
Printers |
| Brand Name |
| Lexmark |
Lexmark |
| Model Name |
| CS331dw |
CS521dn |
| Model Number |
| CS331dw |
CS521dn |
| UPC |
| 734646679794;734646679817 |
734646633420;734646669658;734646669665 |
| CB Model Identifier |
| ES_20290_7082019000000_0012179 |
ES_20290_9042019000000_0012431 |
| Meets ENERGY STAR Most Efficient 2024 Criteria |
| No |
No |
| ENERGY STAR Partner |
| Lexmark International, Inc. |
Lexmark International, Inc. |
| Product Category |
| Imaging Equipment |
Imaging Equipment |
| Additional Model Information |
| C3326dw,C3326dw,Same as tested model but for Open Market |
N/A |
| Date Available On Market |
| July 6, 2019 |
June 18, 2018 |
| Date Certified |
| May 23, 2019 |
September 4, 2019 |
| Markets |
| United States, Canada |
United States, Switzerland, Taiwan, Japan, Canada |
| Professional Imaging Product |
| No |
No |
| Page Format Size |
| Standard |
Standard |
| Marking Technology |
| Electro-photographic (EP) |
Electro-photographic (EP) |
| Color Capability |
| Color |
Color |
| Print Speed (ipm or mppm) |
| 26 |
35 |
| Automatic Duplex Output Capable |
| Yes |
Yes |
| Typical Electricity Consumption (TEC) (kWh/wk) |
| 0 |
0.51 |
| Typical Electricity Consumption (TEC) (kWh/yr) |
| 15 |
26.52 |
| Default Delay Time to Sleep (minutes) |
| 15 |
15 |
| Date Qualified |
| May 23, 2019 |
September 4, 2019 |
