35 BUSINESS MANAGEMENT OF ALL BUILDING AND COMMERCIAL MECHANICAL, ELECTRICAL, AND ELECTRONIC SYSTEMS FOR OTHERS; BUSINESS CONSULTING SERVICES FOR WHOLESALE, INDUSTRIAL AND COMMERCIAL CUSTOMERS IN THE FIELD OF DESIGN, MAINTENANCE, UPGRADE AND OPERATIONS OF BUILDING AUTOMATION SYSTEMS; DOOR-TO-DOOR RETAIL MERCHANDISING OF PRODUCTS, DISTRIBUTORSHIP SERVICES, WHOLESALE DISTRIBUTORSHIP SERVICES, RETAIL STORE SERVICES, RETAIL SERVICES BY DIRECT SOLICITATION BY SALES REPRESENTATIVES, AND TELEPHONE SHOP AT HOME SERVICES, IN THE FIELD OF INDOOR AIR QUALITY IMPROVEMENT PRODUCTS, ENERGY SAVINGS DEVICES, HEATING, COOLING AND PLUMBING SUPPLIES; ENERGY PROCUREMENT AND CONSULTING SERVICES RELATING TO THE EFFICIENT USE OF ENERGY AND ENERGY DELIVERY, NAMELY, PURCHASING ELECTRICAL POWER AND NATURAL GAS FOR OTHERS, DESIGNING AND IMPLEMENTING AN ENERGY PURCHASE STRATEGY, DETERMINING THE MOST VIABLE AND COST EFFECTIVE ENERGY ALTERNATIVES, AND ENERGY RESOURCE MANAGEMENT SERVICES FOR OTHERS