Maybe that's just American vacuum cleaners. The ones in Canada have a vent on the back that always blows hot air. In regular house vacuums it's just a vent, but shop vacs make the in and out tubes the same shape so you can switch the hose from one end to the other. You can vacuum the shop, switch the hose to the other side, then use it as a blower."The whole concept of a vacuum cleaner being a jet engine is all
wrong. It goes against the principles that make jet engines. Vacuum
cleaner create vacuums, that's low pressure. A jet engine works by
creating more pressure, which completes the compression, so it's just
not practical."
mythbusted"
(lifted)
If you'll excuse me, I'm going to set a small gasoline fire then I'm going to have the vacuum cleaner blow air on it. The test is to see whether or not adding air makes it burn faster or slower