Earth Tube Performance Earth Tube Outside Air Temp at Supply Intake is 28 deg. F Earth Tube Inside Supply Air Temp is 52 deg. F Like this:Like Loading... Earth Tube Performance << >>Ice and Water Shield with Radiant Barrier Install Starts About the author : Net Zero Analysis & Design Corp. Principal and CEO of Net Zero Analysis & Design Corp Passive House Consultant Energy Star Partner RESNET Quality Assurance Provider Building America Partner US DOE Zero Energy Ready Home Partner Member of the Board of Directors for BSI Leave a Reply Cancel reply This site uses Akismet to reduce spam. Learn how your comment data is processed.