If you have a lot of aluminum soda cans lying around, why not convert them into something unique and useful? This video will show you how to make a small window unit passive air heater to heat up your room.
This project will take a little elbow grease, but once set up this heater can heat up to 140F! This is more than enough to keep a room nice and warm with the right ventilation.
Video shows: DIY Window Unit Solar Can Heater. Keep A Room Nice And Warm With The Right Ventilation.
Image source: Mitch Varn
Move on to the Next Page video: Building a Solar Can Heater (Window unit).