Thanks for your fast reply, the project will be on a budget, I will pay just 50 USD to get this AC unit
I don t have were to digg trenches as half of the yard is a valley and on the other half is the house.
My ideea to use the well was exactly because I cannot aford multiple well shafts or trenches.... As water suplly this well is amazing....I have used 30 cubic meters in a day without a problem, and thats why I tought there is plenty heat energy down there and it won t be depleted....the well tube is plastic and about 25 cm in diameter and the water column in the well is about 15 meters i think....the whole 15 meters of water won t act as a huge heat exchanger in the ground ?