Will have finalised the purchase of some land in Nakhon Sawan (quite a bit outside NS city in the hills) over the new year. I selected the site for various reasons but most notably because of the ability to use the hill at the back for lots of things. One thing I stumbled upon though was this quote which interests me greatly. So excuse the very very shite 5 minute picture, but what are your views on this.
The idea is that at the rear of the house, a lot of it is actually underground level which when coupled with two things, firstly the heat vent at the a top rear of the house to allow the heat out, and very decent insulation material, should drop the core temperature of the house significantly. Can even utilise the hill cool air as well with a simply fan and filter I reckon.