Energy Efficiency of Earth Sheltered Homes Compared to Conventional?

Earth’s Natural Insulation

Earth sheltered homes take advantage of the earth’s natural insulation properties, where the surrounding terrain and earth itself act as a thermal mass, regulating the interior temperature and reducing heat loss. This can be achieved through various techniques, such as earth berms, which can be as simple as a 3-foot high berm on one side of the home or as complex as a fully buried structure. The earth’s insulating properties can reduce heat loss in the winter and heat gain in the summer, resulting in a more stable interior temperature.

Designing for Energy Efficiency

Designing an earth sheltered home for energy efficiency requires careful consideration of the building’s orientation, layout, and insulation. A well-designed earth sheltered home can achieve a R-value of 20-30 in the walls, which is significantly higher than conventional homes, which typically have an R-value of 10-20. Additionally, earth sheltered homes can be designed with large south-facing windows to maximize passive solar heating and natural daylight. By incorporating these design elements, earth sheltered homes can achieve a high level of energy efficiency, often resulting in a 30-50% reduction in energy consumption compared to conventional homes.