This included refrigeration equipment such as refrigerators, air conditioners, and freezers. Both contain beds and other furniture, televisions, refrigerators and microwaves. More elaborate versions may include dishwashers, refrigerators, or sinks. Voltage regulators are used in devices like air conditioners, refrigerators, televisions etc. Food rotted inside the hundreds of unpowered refrigerators and freezers spread throughout the building. In 1965, it acquired Amana Refrigeration, Inc., a manufacturer of refrigerators and air conditioners. The Amana Corporation, manufacturer of refrigerators and household appliances, was originally started by the group. Basic amenities including washing machines, refrigerators and TVs are available at each dorm. They are known to jump on top of doors, refrigerators and high cabinets. Refrigerators and vacuum pumps contain similar mechanisms. It is well known for its refrigerators and washing machines. This could include tops of doors, refrigerators, bookshelves, and other furniture. Haier began to manufacture full-sized refrigerators for North American market. Freon led to the development of smaller, lighter, and cheaper refrigerators. As of April 2012 refrigerators and internet access are now complimentary.