Rheem manufacturing opened its doors in 1925 in the town of Emeryville, California. Started by two brothers by the names of Richard and Donald Rheem. In the almost 100 years of operation, the company has produced a number of products. Some of those being household appliances like gas ranges and semi-conductors, musical instruments and even steel shipping containers. Today Rheem is the only manufacturer in the world to produce water heaters, heating & cooling, pool/spa heating and commercial refrigeration products. On top of that, all Rheem also takes the cake as the largest manufacturer of water heating products in North America. With that being said, Rheem knows innovation. That's obvious when taking a look at Rheem's heat pump system line up.