Dyson doesn’t stick to chronological order when naming its stick vacuum models. Sometimes it skips numbers, and sometimes it’ll introduce a lower number as a later model than a higher number. For example, Dyson introduced the V15 immediately after the V11, and then the V12 after the V15. In the broadest sense, the numbers seem to loosely grow larger with each passing release—the V11 is newer than the V10, and the V10 is newer than the V8. But Dyson’s naming system is cryptic enough that even we can’t predict what the subsequent model will be.

Dyson also has a lot of sub-models, because its naming scheme isn’t confusing enough. Each one has a different number of included tool attachments and accessories. Every model (V7, V8, V10, V11, V15, etc.) seems to introduce new sub-models, so the list just keeps growing, and then there are discontinued sub-models that show up as old stock on websites, typically on sale.

Detect isn’t exactly a sub-model, but rather part of the name of the V15 Detect and V12 Detect Slim. It refers to the laser detection system that measures particle size and count to customize suction power.

Absolute is usually the king-of-the-hill version with the most attachments. We can’t list them all, because they vary based on parent model, but expect a variety of brush nozzles, crevice attachments, and motorized roller heads to scrub tough grit off hard floors and out of deep-pile carpets.

Allergy used to mean that it came with an upgraded filter that traps 99.99 percent of bacteria and dust so it expels cleaner air than regular models, but after the V7 all Dyson stick vacs started including the upgraded filters. It’s largely a legacy designation now, and it hasn’t been used on newer models.

Motorhead sounds fancy, but it’s the low-end sub-model that comes with a motorized head, a couple of basic brush and crevice tools, and that’s about it. Mostly a holdover from the V7 days. Dyson has found other names for basic sub-models.

Origin, Fluffy, and Animal come with relatively few attachments. The Fluffy and Animal doesn’t come with any unique attachments particular to usefulness in cleaning up after pets; it’s just become shorthand for “base model with fewer attachments.” The same is true for the Origin, although its name makes more sense.

Dyson isn’t above combining sub-model names too. Basically, the more names Dyson slaps onto a model, the more attachments it comes with. For example, the V8 Animal Pro comes with more stuff than the Animal, but the Animal Pro+ comes with even more than that.