What is the difference between a jacuzzi, hot tub and spa?

There is no difference. It's a matter of semantics and company tags. A Jacuzzi is the manufacturer's name of a tub with jets, a hot tub has jets but isn't necessarily manufactured by Jacuzzi, a spa tub could be a Jacuzzi or another tub manufacturer that has jets. A garden tub has no jets. This is the same as calling all tissues Kleenexs or all copying machines Xeroxes. Any tub with jets could have any company name that makes them and there are many. Jacuzzi is a manufacturer's name. There are many names of companies that make jet tubs. We have a Jacuzzi brand garden tub...no jets. It's just a name. ... more