Office printersENERGY STAR certified
Source Technologies ST9921
50 ppm mono printer, model number ST9921.
Speed
50
pages a minute
Color
Mono
Laser / LED
Electricity a year
$4.26
32.8 kWh at 13¢/kWh
Duplex
Yes
automatic two-sided
At 50 pages a minute, the Source Technologies ST9921 is faster than 174 of the 305 office printers certified, and 114 are faster.
Its certified typical electricity use of 32.8 kWh a year is 19% above the median of 69 monochrome office printers within 20% of its speed (27.6 kWh). Electricity is a small part of what a printer costs to run; toner or ink per page is usually the larger one.
- Maker
- Source Technologies
- Model
- Source Technologies ST9921
- Model number
- ST9921
- ENERGY STAR type
- Printers
- Marking technology
- Laser / LED
- Color
- Monochrome
- Speed
- 50 pages a minute
- Size format
- Standard
- Automatic duplex
- Yes
- Typical electricity use
- 32.8 kWh a year (TEC method)
- Default delay to sleep
- 15 min
- On the market since
- Oct 2023
- ENERGY STAR certified
- 24 Oct 2023
Source: ENERGY STAR certified imaging equipment dataset, US EPA, record 2687116, data build 2026-09-29. Figures are as the maker certified them. How we use this data.
Other makers
Machines comparable to the Source Technologies ST9921
Certified office printers from other makers, same color class, within 20% of its speed.
| Model | Type | Speed | kWh / yr | Certified |
|---|---|---|---|---|
| Konica Minolta bizhub 4702P | Mono, Laser / LED | 50 ppm | 22 | Dec 2017 |
| Konica Minolta bizhub 4700i | Mono, Laser / LED | 50 ppm | 31 | Mar 2020 |
| Brother HL-L6210DWT | Mono, Laser / LED | 50 ppm | 30 | Dec 2021 |
| Lexmark MS631dw | Mono, Laser / LED | 50 ppm | 30 | Oct 2022 |
| Lexmark MS632dwe | Mono, Laser / LED | 50 ppm | 31 | Oct 2022 |
| Xerox B410 | Mono, Laser / LED | 50 ppm | 31 | Apr 2023 |
Source Technologies
More Source Technologies office printers
| Model | Type | Speed | kWh / yr | Certified |
|---|---|---|---|---|
| Source Technologies ST9917 | Mono, Laser / LED | 38 ppm | 25 | Sep 2023 |
| Source Technologies ST9920 | Mono, Laser / LED | 50 ppm | 33 | Sep 2023 |
| Source Technologies ST9922 | Mono, Laser / LED | 50 ppm | 34 | Oct 2023 |
| ST9820 | Mono, Laser / LED | 50 ppm | 32 | Sep 2019 |
| ST9830 | Mono, Laser / LED | 55 ppm | 36 | Sep 2019 |