Hot tubs can be an excellent addition to your home, besides being extremely convenient. They can be installed indoors or outdoors, depending on your preference. Some of them are portable, too, and you can easily take them with you when you move. In addition, they are energy efficient, and you can install them in a few days. Spas are energy-efficient Energy-efficient spas have become a top priority for consumers as the cost of energy increases. With the introduction of the new energy-efficiency standards in California, spa manufacturers are responding to consumer demands for greener products. As of July 16, there were 238 certified models on the market. The new standards…