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Earth Tubes for Ventilation  RSS feed

 
Jim Argeropoulos
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Any one have any experience with earth tubes for providing ventilation?

rob roy built it into his house and says it would be one of the things he wouldn't do again. I don't know why.
Don Stevens http://www.greenershelter.org likes the idea but is dead set against the use of PVC tubing.
John Hait http://www.earthshelters.com/ I seem to remember construction pictures on his site using PVC.
David Wright in his awesome 1978 book http://www.amazon.com/Natural-Solar-Architecture-Passive-Primer/dp/0442295863 recommends using clay piping. He recommends a pitched system with a dry well near where the piping enters the house so that the warm summer air is dried via condensation on the piping.

I have to say it makes perfect sense to me to not only use earth tubes but to use them to install a displacement ventilation system http://www.ambthair.com/displacement_vs_mixed_flow_ventilation.html#displacement that uses a solar chimney http://en.wikipedia.org/wiki/Solar_chimney to draw the air out.

I'm thinking that if air temperature is an issue in the winter, and I live in a cold northern climate, a heat exchanger powered by solar water heater would be a good answer.

I'm wondering if anyone has ever encountered a system like this.
 
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