The motor wattage of a vacuum cleaner ultimately affects the suction of the appliance. In short, the higher the wattage, the higher the suction power. And if you want to find the best vacuum cleaner for suction, it’s a good idea to try and find one that offers over 500W of power. However, what you might not realise is that the construction of the vacuum cleaner can also affect the suction. That’s because suction is also affected by air resistance - which is increased when you have a vacuum cleaner with a long handle and hose. In fact, it’s made even worse when these components have creases or crevices on them. Because of this, you’ll often find that the vacuum cleaners with the best suction are smaller than some of the bigger vacuum cleaners on the market.