Why do we have radiators under windows?

Online Answer
Windows are traditionally the worst insulated surfaces in a building shell. ... In the twentieth century, to combat that cold feeling and keep the room comfortably warm, radiators were always placed under a window. The rising heat of the radiator forms a kind of hot air curtain that shields you from the cold air.
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5 ways to insulate your apartment windows
  • Use window insulation film. Window film creates an insulating barrier between the interior of your apartment and your windows. ...
  • Cover your windows with bubble wrap. ...
  • Install removable magnetic window insulation. ...
  • Use rope caulk to seal cracks. ...
  • Add thermal curtains to your windows.
  • Domestic Dispatches: 5 Ways to Cover 50 Windows on a Budget
  • Don't panic. ...
  • Hang simple solid-color curtain panels. ...
  • Sew your own. ...
  • Use the money you saved in other rooms to splurge on custom shades or blinds for the bedroom. ...
  • Some windows may not need anything. ...
  • Inexpensive cut-to-order wooden or bamboo shades.