Ventilation equipment in the nature of metal ventilating ducts; geothermal ventilation equipment, namely, metal pipes located below ground surface
Metal GoodsRenewable energy equipment, namely, windmills and geothermal equipment, namely, geothermal pumps
MachineryResidential fiberglass insulation, sprayed building insulation, and rigid building insulation; wall system consisting of insulated concrete blocks; ventilation equipment in the nature of flexible plastic pipes; geothermal ventilation equipment, namely, flexible non-metal pipes located below ground surface
Rubber GoodsConcrete walls for building and concrete floors, ventilation equipment in the nature of non-metal ventilating ducts; geothermal ventilation equipment, namely, rigid non-metal pipes located below ground surface
Nonmetallic Building Materials