Earth cooling tubes present an alternative for controlling temperature within residential and office buildings as well as greenhouses and other structures requiring temperature regulation. These tubes run underground and alter air's cooling or heating temperature before it is allowed into a home or office. En route, the air releases its heat to the surrounding soil so it becomes cool air when it reaches its target structure. If the soil surrounding the tubes is warmer than the air within, the air acquires heat so it becomes warm air when it reaches its target.

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A rammed earth building is constructed using a mixture of earth, gravel, sand, silt and clay. The mixture is placed between framework forms and then rammed using a mechanical rammer or hand rammers. Once the mixture is fully compressed, the framework is removed leaving the completed rammed earth wall. The thickness of the external walls is normally around 30cm, but internal walls can be thinner. The framework is setup first, to create the desired shape. The sand added to the mixture helps reduce shrinkage of the wall. The mixture can also be ‘stabilized’ by adding 5 to 10% cement – this is recommended in climates where the wall may be exposed to driving rain. It is important that rammed earth houses are designed in such a way that affords them maximum protection from the rain, such as using substantial overhang on the roofs.

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