Earth Tubes II

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Requirements

  • 750 cfm
  • max 7 ft/sec
  • 80 feet long
  • affordable

Design / Selection

  • Ideas
    • reach volume / price balance
  • Design
    • 6 - 6" pvc tubes ... actually 2 more were placed for the earth room
    • Location: backyard
    • Length: +/- 80 ft
    • Speed = 10.6 ft/sec @ 750cfm
    • Chimney out of corrugated steel bolted to building (no foundation needed)
    • Needs a bypass?
    • Collect condensation in building in barrels for watering plants inside.

Rationale

  • Connectedness to the earth
  • net zero-energy
  • simplicity