Who is Hot Tub Discounts Hot Tub Discounts LLC is a family business that has been in the hot tub industry for over 32 years. We founded ThermoSpas Inc. (the world’s largest retailer of hot tubs) and operated it from 1983 until it was sold in 2012. Today, Hot Tub Discounts is able to select the best quality Hot Tub and Swim Spa brands in the country and sell them to you at the lowest prices available.