People ask this question, even after hearing the sales pitch, because they still question why these are important. Like buying a car, the horsepower number is not actually important. In this case, neither is the number of jets. These are just marketing numbers, often used to distract you from the real performance of the product, what is important is that the SYSTEM is designed to give you the best possible hydrotherapy massage. This requires the horsepower to be balanced with the size of the plumbing and the number of jets. Larger pumps and plumbing allow manufacturers to add more jets per pump to a hot tub design. Too many jets without the proper horsepower of plumbing will result in poorly performing jets. Too much horsepower with plumbing that is too small or with too few jets will result in a waste of power, and you will be paying an electric bill for big pumps that are not giving you the therapy that you want. The bottom line – don’t get obsessed about the numbers. The top manufacturers employ certified engineers to balance the plumbing system, place the jets in optimal locations, and decide which EXPERIENCE is best for you.