still I have not been able to find any examples in a tropical climate, air ventilation seems the most used and effective methode sometimes the suroundings are put to use. I am not sure what the effectiveness is of ground cooling it also seems most effective when there is serious differences between ground temperature and air. And I am not sure that is the case in a climate that basicaly always is warm and humid. just cooling a space without getting rid of suprlus water seems trouble to me if I would build in the Philipines this would be my angle, bahay na bato: there are some nice examples of such real philippino(-spanish) architecture, with sliding pannels etc. have a look here Photography, Heritage and Architecture - SkyscraperCity that place is full of threads and pictures on architecture in the Philippines Going back to former building methodes in a country has its advantages, they tend to take a lot of issues in consideration that are still valid, fit in the country (there are more then enough really ugly buildings in Ph). It seems a simple design that should not give local contractors much problems, not too flashy/show-off from the outside en pretty good on the safety side. Still a lot of ways to make it your own from veranda's outside to a modern variant.