Pentair WhisperFloXF® 022035 VS Commercial Pump 5 HP - The WhisperFloXF VS Commercial Pump is the first five-horsepower variable-speed pool pump that runs on single-phase or three-phase power. It’s an economical, combined motor per drive solution for both HMAC (hotel, motel, apartment, condominium) or large residential installations. This pump provides sophisticated, energy-saving pump technology without the high costs typically associated with independent pump per external drive setups.