I work in a vacuum shop, and by far the best and most reliable canisters are made by Miele, a German company. I would suggest a vacuum from their new constellation line such as the Luna or Antares
Some canister vacuums are suction vacuums. These canister vacuums do not need electricity.
Speaking from experience being an owner and regularly using one, the best brand of canister vacuums is Dyson. The Dyson vacuum cleaner really does a great job removing dirt and lint the first run through.
Bag vacuum cleaners require a bag and this is what catches the dirt that you vacuum up, when the bag gets full, you simply throw it away and replace it. Canister vacuums suck up the dirt into the canister attached to the vacuum. You then detach the canister and dump the dirt out of the canister.
The best place to find a canister vacuum cleaner for sale is online. Amazon and eBay's websites both sell canister vacuums inexpensively, and with many different styles in stock.
The best brand of industrial vacuums is Shop-Vac. They're canister vacuums that are used by countless businesses and individuals who need a sturdy machine to clean up their workspace. They are widely available at hardware stores in North America.
There are stick vacuums, small vacuums, central vacuums, canister vacuums, and upright vacuums. The type of vacuum one would want to purchase depends on what the vacuum is going to be used for.
Canister vacuums are very popular in Europe. The motor and the dust collector are in separate parts of the vacuum cleaner. The great thing about canister vacuums are that one can attach different heads to perform different tasks.
The four primary categories of household vacuums are upright, canister, stick, and handheld models
Hoover, Dyson, Bissel, and Dirt Devil all carry canister type vacuums. These brands may be purchased at stores such as Walmart and Kmart, as well as home improvement and retail stores such as Sears.
Most vacuums these days are bagless so it is easy to find one that has this features. Bissell, Dirt Devil, Panasonic, and Dyson all have vacuums that are bagless.
It is personal preference as to whether or not you choose bagless vacuums over the others. You do save money not having to buy bags, but you also have a litte more of a mess trying to clean out the canister of a bagless vacuum.
Stick vacuums are similar to upright cleaners, but they usually lack a rotating brush and are less adept at cleaning than either canister or uprights. Stick vacuums, though, are usually lightweight, easy to store, and inexpensive