I currently have a single speed Whisperflo 1 HP pump and am thinking of upgrading to something more energy efficient. What should be most cost effective; 2 speed motor, Marathon Impower, or Pentair Intelliflo? Or other better option?
20k gallon pool, no spa, de filter
paying $0.32 per kwh (California)
running pump 4 hours/day off season and 6-7 hours in summer
also have separate polaris 280 with booster pump running 1-2 hrs/day