37 Installation, maintenance and repair of air filters; repair of air intake filters for machines; repair of air filters; repair of air filters and their parts; rental of cleaning equipment; rental of cleaning equipment; rental of cleaning machines; cleaning of buildings (facades); building cleaning; building cleaning (interior); cleaning of buildings, industrial areas and construction sites; cleaning of industrial facilities; cleaning interiors and exteriors of buildings; cleaning of commercial and office premises; cleaning of residential and commercial properties; house cleaning; information, advisory and consulting services regarding cleaning; installation, maintenance and repair of heating, air purification, refrigeration, drying, ventilation, temperature control and air conditioning appliances; installation, maintenance and repair of air purification devices; disinfection