If you search long enough you will find many unbiased peoples actual energy consumption with the intelliflo at a low speed is the same if not more than the rating on a 2sp. If you look into it enough, you will not find any Pentair data that backs up their claims. They have no postings on energy consumption to compare it to a 2 sp but they do post the energy usage on all of their other pumps. The argument for this is that there are hundreds of speeds so you could not publish this, however they could very easily post data @ 1750 RPM flow and energy consumption in order to compare it to the 2sp. It just seems a little shady to me. Everybody knows that a company can make whatever claims they want since there is rarely any recourse other than a cease and desist order IF they are caught. A variable speed motor is not a new idea or new technology, if it is this good how come every pump isnt one, how come they only have one size, how come every other competitor isnt jumping all over it? Hayward now has one, fine, this was in reaction to Pentair convincing energy boards to require them since they were the only game in town. As far as using this pump for multiple functions, it is not efficient at high speeds. At max speed its on paper consumption is 3680 where a 2.5 uprated whisperflo 2 sp is 2530. Whats often overlooked is that you dont get good mixing of the water or skimming at too low of a speed, you still have to run the Intelliflo faster at some point during the day which is never calculated in these exagerated claims. Its not an inefficient pump by any means, its just very overrated.