The SkillsUSA Championships occupy 1.79 million square feet (31 football fields or 41 acres) of floor space. More than 6,000 students competed in 110 contests.
PPI MS-7 includes detailed specifications for four plastic piping materials which have been proven in ground-source heat exchange systems: HDPE, PE-RT, PEX, and PP (PP-R and PP-RCT).