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saving especially when considered over the lifetime of the home. The reductions incarbon emissions and other pollutants related to the energy required for airconditioning are staggering. These two elements represent nearly fifty percent of theaverage homes annual energy usage. Using passive solar and natural coolingreduces pollution by as much as 90%. Of course all of these numbers are dependenton the area in which you live, level of effectiveness in the passive solar/naturalcooling systems, and level of supplemental heating required in the form of a w oodburning stove and/or hydronic in-floor heating/cooling system.Passive SolarÜ Energy savings can reach 90% with passive solar.Layout Elements(reverse in southern hemisphere)R Use site trees and berms to block winds to northR Face true south within 10°R More levels to south to capture more heatR Reduced levels to northR Living areas southR Sleeping, utility areas northR Green roof provides additional insulation in the winterKey FeaturesR Insulating windows south primarily (north in the southern hemisphere)R High insulation in foundation, walls (straw bale), and roofR Thermal mass to store heat or cold, typically concrete floors, approximately sixinches thick, heat is released at night in the winter and coolness is released at nightduring the summerR Shading for summer cooling when sun is high in the sky132