On 9 Mar 2005 16:26:11 -0800, wrote:

What's an Earth Pipe?

A pipe that runs under the garden, 4" wide, 20' long. Fan air in via it
and in summer the air will be cold.

add a heat exchanger inside the house to keep out any trace of mould
from condensation.

Less cost than ac if you diy (dig it yourself), a small fraction the
run cost and energy use.

Do these really work? Why aren't they widely used?

sPoNiX