Hot Tubs and Spas TermsDefinitions of the terms used in the spa and hot tub industry. Spa and or Hot Tub: These two terms are for the most part interchangeable. Their roots are. A barrel or other wooden vessel used to contain warm/hot water for the purpose of soaking. (Like the old Redwood style tubs) A vessel containing warm water with jets and/or air injectors for the purpose of generating turbulence in the water and offering massage.In the modern market there are only a very small few manufactures of "Hot Tubs", although several persons in the spa industry will refer to their "Spas" as "Hot Tubs". Trying to differentiate between the two terms is really just an exercise in semantics. "Jacuzzi" is a brand name hot tub/spa, like "Kleenex" is a brand of facial tissue. Jacuzzi also makes a number of other things including jetted bath tubs showers and other Home Improvement features.Jet: A nozzle that water comes out of. An outlet for air from a blower. often in the spa and hot tub industry this is a combination of a water pump and pump motor. a motor used to push air into the tub, like a vacuum hooked up backwards. Use caution sometimes sales people will classify this as a motor, right along with the pumps.Ask specifically how many pump motors, and how many blower motors a spa has. One other consideration is a circulation pump see below. Ozonator / Ozone (O3) Generator : Not to be confused with an ionizor, an ozone generator creates ozone by exposing oxygen from air to Ultra-violet light or a Corona Discharge (like an arc of electricity), to help purify the spas water. Ozone generators are not a replacement for chemicals but rater help reduce the need of some chemicals. (see Ozone under the hot tub and spa chemical section of this site at for more info)Ionizor: sheds a mineral or metal in to the water to help reduce bacteria and algae levels. Usually sheds Copper, Zinc or Silver ions. Circulation Pump: A small pump designed to filter and / or circulate water for the ozonator. Usually puts out between 4 and 30 gallons per minute. This small pump is sometimes set to 24 hour a day running. Motor: Often used to describe both pumps and blower, as each does have an electrical motor. A consumer should ask if a spa has multiple motors, what each motor does, some may pump water, some may blow air, some may be for circulation only some may be used to power the therapy jets, or pump water through the jets.
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