. . . . . "A window fan is a fan designed to be placed inside the frame of a window. Window fans have been used for many decades to maintain comfortable temperatures and ventilation within one's home, and operate at a tiny fraction of the cost of central air conditioning."@en . . . . . . . . . . . . . . . . . . "4555540"^^ . . . . . . . . . . . . . . . . . . . . . . "Window fan"@en . . . . "1111747713"^^ . . . . . "A window fan is a fan designed to be placed inside the frame of a window. Window fans have been used for many decades to maintain comfortable temperatures and ventilation within one's home, and operate at a tiny fraction of the cost of central air conditioning."@en . . "2309"^^ .