The best vacuums for residential or other uses are ones that are designed to be airtight. This is the single most crucial element in figuring out how high-quality a vacuum cleaner is. Any additional features, such as how maneuverable they are, whether they are upright or canister, the length of the cable, where the switch is located, etc., are important, but they are secondary to the necessity of airtight design and construction. We must stress this again and again.
The basic truth is that if a vacuum cleaner is not airtight, the pressure inside the device will cause large amounts of extremely microscopic particles to be forced out of the suction while it is functioning. These tiny particles will generally float in the air for hours or days because of their small size and simultaneous lack of weight. As a result, the people who live there—you, your family, your pets, etc.—breathe in a lot of pollutants that are, from the standpoint of basic health, best avoided in the breathing zone, such as bacteria, dust mite allergens, dander, pollens, molds, etc. that have been removed from the carpet and other surfaces.
To put it another way, a household vacuum cleaner can be thought of as nothing more than a tool. Like any other instrument, if it is unable to carry out necessary tasks, it is not a good tool. Nobody would purchase a screwdriver with a poorly formed end; similarly, if a vacuum cleaner is unable to capture and remove the smallest particles, such as bacteria, dust mites, and dander, it is failing to perform as intended as a tool and risking the health of everybody who uses the space.
Airtight vacuum cleaners have only seldom been produced by manufacturers. Most early vacuum cleaners developed to employ shake-out fabric bags as a method to catch (dirt) particles. Some manufacturers still provide this design as an inducement to avoid paying for additional bags, primarily for business use. This design was, and still is, terribly filthy. The bag assembly right away transforms into a haven for the growth of germs, in addition to the obvious drawback of having just the most basic capacities to hold particles. Anyone for smells?
Paper bags were then employed, occasionally placed inside of fabric bags, whether they were upright or canister-shaped. In addition to using paper bags, which are still in use today, microfiber bags have become more popular recently, marking a significant advancement in bag technology. It's interesting to note that at the same time, bagless vacuums became popular. Manufacturers, at least in part, adopted this design as a means to persuade consumers to purchase new vacuums on the basis that there was no longer a need to spend money on bag purchases. In actuality, a vacuum cleaner's bag serves as the primary mechanism for collecting dust particles. Without the bag, the vacuum cleaner would be severely harmed by an overwhelming amount of dust particles. In addition, emptying the vacuum dirt chamber without a bag is an asthmatic's worst nightmare.
Today's top vacuum cleaners for homes are typically produced in Germany and Italy. The vacuums are airtight, powerful, smooth, and simple to use thanks to brands like Miele, Sebo, and Lindhaus, among others. Furthermore, unlike the common, disposable Chinese machines, they are durable.