Air-conditioning, air cooling and ventilation apparatus and instruments; Air filtering installations; Air filtering units; Air sterilizers; Air sterilizers for household purposes; Drying apparatus for use in heating, ventilation systems, air conditioning systems and refrigeration systems; Electric air deodorizing apparatus; Electric air driers; Electric fans; Evaporative air cooling units for domestic use; Gas purification machines; Heating and cooling panels used for indoor heating and cooli...