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Earth tubes (earthtubes, or earth-air tubes) are underground tubes that use geothermal energy to cool or heat temper the air for your home.
TABLE OF CONTENTS (chapters.
Being completely passive, this is a Sustainable technology based on designs that are 3,000 years old and still used today around the world to cool homes.
It works like Cheap air Conditioning because you can build it Yourself for several hundred dollars and it is FREE to run (no electricity needed).
Earth tubes (earthtubes, or earth-air tubes) are underground tubes that use geothermal energy to cool or heat temper the air for your home
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