IC 011. US 013 021 023 031 034. G & S: Air-conditioner; central air handling units, central HVAC air handling units, air-conditioning apparatus and ventilation apparatus and instruments and parts therefrom as far as included in this class; air-conditioning apparatus, namely, central air handling units, central HVAC air handling units, air-conditioning apparatus and ventilation apparatus for the distributing of air, for filtering of air and for regulating air mixtures; central air handling units, central HVAC air handling units, air-conditioning apparatus and ventilation apparatus adapted to acoustic properties and for fire protection; refrigerating covers, namely, thermally isolated panels and doors; equipment for ventilation and air-conditioning as far as included in this class, namely, central air handling units, central HVAC air handling units, air-conditioning apparatus and ventilation apparatus
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