| Type | Model | Rated Voltage (VDC) | Operate Voltage (VDC) | Rated Current (mA) | Rated Input (W) | Rated Speed (rpm) |
| Bottom Speed | HDF4020L-05LLB | 5 | 4.25 -5.75 | 75 | 0.38 | 3300 |
| Low Speed | HDF4020L-05LB | 5 | 4.25 -5.75 | 105 | 0.53 | 4200 |
| Low Speed | HDF4020L-12LB | 12 | 10.2 -13.8 | 40 | 0.60 | 4200 |
| Middle Speed | HDF4020L-12MB | 12 | 10.2 -13.8 | 70 | 0.84 | 5900 |
| Type | Model | Max. Airflow (m3/min) (CFM) | Max. Static Presure (mmAq) (inchAq) | Noise Level (dB (A)/m) | Weight (gr)(oz) |
| Bottom Speed | HDF4020L-05LLB | 0.10/3.5 | 1.2/0.05 | 21 | 32/1.1 |
| Low Speed | HDF4020L-05LB | 0.13/4.6 | 1.8/0.07 | 23 | 32/1.1 |
| Low Speed | HDF4020L-12LB | 0.13/4.6 | 1.8/0.07 | 23 | 32/1.1 |
| High Speed | HDF4020L-12MB | 0.18/6.4 | 3.5/0.14 | 26 | 32/1.1 |