// Earth tubes (earthtubes, or earth-air tubes) are underground tubes that use geothermal energy to cool or heat temper the air for your home. 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). Being completely passive, this is a […]
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Cheap Air Conditioning is what Earthtubes (earth-air tubes / earth tubes) are all about! You can build your own earth tubes for passive cooling/natural cooling for about $150 per tube. They can completely replace your air conditioner(s) on your home, provided you follow some important steps and make them correctly. Earth Tubes We […] |
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