A sunroom (also solarium, garden room, and other variations) is a structure, either attached or integrated into a building such as a home, restaurant, or office, which allows enjoyment of the surrounding landscape while being sheltered from adverse weather. Also known as a sun parlor, sun porch, sun lounge, patio room, Florida room, garden conservatory, or Wintergarden, such rooms are popular in the United States, Europe, Canada, Australia, and New Zealand. In Great Britain, with its long history of formal conservatories, small scale “sunrooms” are also sometimes known by that term. Sunrooms are used in passive solar building design as a technique for heating and lighting structures.