Allen Heating and Cooling is a one of a-kind business that does not charge you for overtime. We service and repair all brands of air conditioners, heaters, boilers, humidifies, air cleaners and Furnaces. Call today for a free estimate. Allen Heating and Cooling provides 24/7 Emergency Service, 815-298-8020.. Gas Generators|Air Conditioning Equipment|Installation|Repairs|Heating Contractors