Rheem Water Heating recently launched a special spring and summer sales promotion to encourage contractors to buy and install the new Rheem or Ruud HP Series of hybrid electric water heaters with energy-saving heat pump technology. The two-part special offer includes a $25 discount on any Rheem or Ruud HP Series hybrid water heater purchased between May 1 and September 15, 2010, and a free Rheem or Ruud HP Series water heater by purchasing and installing 10 of these models between May 1 and September 15, 2010.