A Homemade Solar Air Heater that Can Produce Free 140 degree F Hot Air

HomeMade Solar Air Heater
The finished solar heater moves a lot of hot air and you won't pay a dime to produce it

HomeMade Solar Air Heater ( Solar Thermal Magazine)

If you are looking to save some money on heating your home or apartment this winter and have some time on your hands and some basic hand tools you should take a look a this how to video instruction on building a passive solar thermal air heater.

This┬ávideo provides very detailed instructions on how to build a passive solar air heater with very little expense or effort. The finished solar heater moves a lot of hot air and you won’t pay a dime to produce it.

The cold air enters through vents at the bottom of collector and is heated by the sun as it is pulled up through the seven columns of cans. The fan is included to also draw the heated air from the airspace surrounding the cans. This unit is made of used (and cleaned) ┬ásoup or vegetable cans, one 9 foot piece of wood makes the frame, cardboard for insulation (store-bought insulation board can be used as well), a 20″ by 32″ inch piece of plexi-glass and a computer cooling fan.



The air ducting is made of 3″ diameter aluminum duct that you can buy at any hardware store. The design goes completely off grid by using a 5 watt solar panel (or larger) to power the fan.

Enjoy the video and the money you save.

About Gordon Smith
Gordon's expertise in the area of industrial energy efficiency and alternative energy. He is an experienced electrical engineer with a Masters degree in Alternative Energy technology. He is the co-founder of several renewable energy media sites including Solar Thermal Magazine.


  • Alison says:

    Um, where’s the video? All I’m getting is a pic I can pin

  • admin says:

    My bad. It is included now, enjoy.

  • Linda says:

    This looks like an interesting project and I have seen others somewhat like this. Your video and instructions are not complete enough for someone with no experience in these types of projects. How and where is the fan installed? Soup cans go where exactly – cans open at both ends? No indications of where the insulation is installed. This all probably seems pretty simple to you, but maybe not so for others.

  • Great to see anyone working on solar heating! The technology has improved and there are many more effective designs out there! Here is a simple design, with detailed plans included in the video’s description on YouTube. I hope this helps those of you really looking to reduce heating bills and pollution. This design is made to last for many, many years, as will the Okapi fan control system that can maximize its solar heat harvest! Contact us at our website if you have any questions. We are here to help.

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