| Product Program Category |
| Imaging Equipment |
Imaging Equipment |
| Type |
| Printers |
Multifunction Devices (MFD) |
| Brand Name |
| Lexmark |
Lexmark |
| Model Name |
| CS331dw |
MX331adn |
| Model Number |
| CS331dw |
MX331adn |
| UPC |
| 734646679794;734646679817 |
734646695664;734646720496 |
| CB Model Identifier |
| ES_20290_7082019000000_0012179 |
ES_20290_4302020000000_0012643 |
| 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 |
MX331dn,MX331dn,Same as tested model, but without fax |
| Date Available On Market |
| July 6, 2019 |
April 20, 2020 |
| Date Certified |
| May 23, 2019 |
October 7, 2019 |
| Markets |
| United States, Canada |
United States, Switzerland, Taiwan, Canada |
| Professional Imaging Product |
| No |
No |
| Page Format Size |
| Standard |
Standard |
| Marking Technology |
| Electro-photographic (EP) |
Electro-photographic (EP) |
| Color Capability |
| Color |
Monochrome |
| Print Speed (ipm or mppm) |
| 26 |
40 |
| Automatic Duplex Output Capable |
| Yes |
Yes |
| Typical Electricity Consumption (TEC) (kWh/wk) |
| 0 |
0.43 |
| Typical Electricity Consumption (TEC) (kWh/yr) |
| 15 |
22.36 |
| Default Delay Time to Sleep (minutes) |
| 15 |
15 |
| Date Qualified |
| May 23, 2019 |
October 7, 2019 |
