11 Air distribution devices, namely, air distribution grilles, registers in the nature of grilles with multi-shutter or opposed blade dampers and air diffusers for residential, light commercial and commercial air distribution, active thermally responsive diffusers and active thermally responsive grilles for regulation of air volume and flow pattern based upon user specified temperature; air cooling and heating apparatus in the nature of commercial variable air volume (VAV) units; air distribution units, namely, fan powered air terminal units (ATU); air cooling and heating apparatus in the nature of commercial variable air volume (VAV) units with electronic controllers; air distribution units, namely, fan powered air terminal units (ATU) with electronic controllers; air heating and cooling apparatus in the nature of commercial variable air volume (VAV) units without electronic controllers; air heating and cooling apparatus in the nature of air terminal units (ATU) without electronic controllers; air heating and cooling apparatus in the nature of commercial variable air volume (VAV) units provided as a set with fans and accessories, namely, electric duct heaters, hot water coils and sound attenuators; air distribution units, namely, fan powered air terminal units (ATU) provided as a set with fans and accessories, namely, electric duct heaters, hot water coils and sound attenuators