Air handling equipment, namely air conditioners; ventilators for use in commercial and industrial buildings with fans, heat exchange systems, heat recovery systems, air cooling systems, air purifying systems and humidifiers; ventilators with gas surface burners for industrial and commercial uses; flat appliances, namely humidifiers, electric space heaters, air conditioners and air purifiers; warm air heaters for industrial and commercial use, warm air heaters with adjustable bypass for indust...