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Converting Your Free Flow Spa From 115V to 230V: Faster Heating, What It Takes, and Is It Worth It? One of the best things about a Free Flow spa is how easy it is to start using. Every model ships as a plug-and-play hot tub that runs on a standard 115 volt household circuit, so you can fill it, plug it in, and start heating without hiring an electrician. For many owners, that is all they ever need. But if you live somewhere with cold winters, use your spa heavily, or find yourself waiting a long … read more