Comparison Dreame F9 Pro vs Dreame D9 Max

Measured in Pa, this indicator describes the robot vacuum cleaner's suction pressure: the higher it is, the easier it is for the device to pick up heavy debris and clean carpet pile. Values around 2,000–4,000 Pa are usually sufficient for regular cleaning of smooth floors, while 6,000–10,000 Pa and above are better suited for collecting hair, sand, and dirt from carpets or floor joints.

The tank capacity determines the water supply for moistening the pad, rotating mops, or cleaning roller. Compact tanks of around 200 ml are suitable for regular wiping of small areas, while 300–500 ml tanks allow fewer interruptions for refilling during cleaning.

Voice assistant lets you control the robot vacuum cleaner with short commands via a compatible smart speaker, smartphone, or smart home system. You can use your voice to start and stop cleaning, return the device to the docking station, and on some models, select a room or operating mode. This feature is especially convenient when your phone is not nearby, but the set of available commands depends on the robot model and the supported platform.

Battery capacity indicates the amount of charge available to the robot vacuum for navigation, motor operation, brushes, and the mopping system. A higher-capacity battery can potentially provide longer runtime, but it does not allow the exact cleaning time to be determined without considering the device's power consumption. Operating time is more strongly affected by the selected mode, suction power, floor type, use of mopping pads, and frequency of returns to the docking station.

The cleaning area refers to the approximate room size the robot can cover on a single battery charge. In Eco mode, the device will cover more space than at maximum suction power or during intensive floor mopping. The value stated by the manufacturer is usually calculated for a relatively uncluttered room and may be lower in real conditions.

Threshold climbing indicates the maximum height of an obstacle that the robot vacuum can climb over on its own. A 15 mm level is usually sufficient for small floor covering joints, while 20 mm is better suited for standard interior door thresholds and carpets with a noticeable edge.

The dB rating helps assess how noticeable the robot vacuum will be during cleaning. A level of 55–60 dB is typical of quiet robots, 60–70 dB is considered standard, and values above 70 dB are typical of the most powerful modes. The lower the rating, the less the device interferes with conversations, rest, or work.