Watch: Professor John Dyson's inaugural lecture at the University of Birmingham – 'In search of treasure and redemption'

Clean the Filters.

This makes comparing vacuums difficult.. It’s important to check.airflow is being measured, as this affects the air watts calculation.

Watch: Professor John Dyson's inaugural lecture at the University of Birmingham – 'In search of treasure and redemption'

For a true estimate of suction power, the airflow must be measured at the cleaner head..In reality, the biggest issue is #2: most manufacturers don’t provide air watt figures for their vacuums.Without being able to compare vacuums using the same rating, air watts becomes much less useful..

Watch: Professor John Dyson's inaugural lecture at the University of Birmingham – 'In search of treasure and redemption'

Note: Air watts are measured with a clean filter and unobstructed airflow.A clogged filter greatly reduces suction power, which is why it’s important to properly maintain your filters.

Watch: Professor John Dyson's inaugural lecture at the University of Birmingham – 'In search of treasure and redemption'

We’ve written a guide for.

maintaining suction power which may be useful if your vac is losing suction.of a vacuum, while.

is just the amount of.provided to the motor.. To break this down further:.

– This is just how much power is being drawn by the motor.Much of this power is lost as heat, noise, and due to the vacuum’s efficiency, so watts are not a good indicator of a vacuum’s performance.. Air Watts.