AIRTHO

Metal suspended ceiling systems comprising panels; metal structural ceiling support systems consisting of ceiling panels of metal, ceiling supports of metal; metal plenum cap systems comprising metal support grids, ceiling panels of metal, and suspension elements, namely, metal suspension bars.

Ventilating fans for industrial purposes; fans for air-conditioning installations; fans for HVAC units; Clean rooms, dry clean rooms, and negative pressure isolator clean rooms sold in kit form comprised of HVAC units, air filtration units, structural ceiling and wall supports of metal, prefabricated metal walls, windows and doors of metal; pre-fabricated, factory-built modular clean rooms, dry clean rooms, and negative pressure isolator clean rooms made substantially of metal; ventilating fans and fan housings for industrial purposes sold in kit form comprised of metal fans and metal fan housings.