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BEL-O Service & Sales has been providing quality Heating, Cooling, Plumbing, Pest Control, Sales and Services to Belleville and its surrounding communities for over 49 years. We offer a complete line of Carrier products which includes High Efficiency Furnaces, Air Conditioners, Heat Pumps, Humidifiers, Electronic Air Cleaners, Heat Recovery Ventilation, Energy Recovery Ventilation and Programmable Thermostats.