New Delhi, Jan. 5 -- Handheld vacuum cleaners are often judged by bold numbers printed on the box. Motor wattage, suction power, and battery voltage usually grab attention first. Yet many users quickly realise that two handheld vacuums with similar specifications can perform very differently. One lifts dust effortlessly, while the other struggles with crumbs and pet hair. The reason lies not in raw power, but in airflow design. Airflow is the hidden engine behind effective cleaning. It determines how dirt is lifted, transported, and stored. Without proper airflow engineering, even a powerful motor delivers disappointing results.

Suction and airflow are often confused, but they perform different roles. Suction is the pulling force created...