I've seen these earth tubes used quite a few times on episodes of Grand Designs and I'm wondering if they are viable to use in Thai construction, and if anyone has used them.
The basic idea is that whilst building the foundations you drop a pipe underground where your house will be, leading to near the edge of your property. Warm air then enters the pipe to a depth of about 3ft where there is an average temperature of 13ºC (I don't know the ground/depth temperatures in Thailand) and the cooled air enters your home.
Here's a very basic diagram that I found on google.
Just wondering if any experts here can say if this technology could be applied in Thailand?
Also would there be problems with the type of ground here, wildlife etc?