Set your thermostat and find your perfect comfort zone with help from Collard Heating & Air Conditioning. Our HVAC service in Herrin, Illinois, is an authorized Lennox dealer, and we consider customer satisfaction to be our number-one priority. Thats why our friendly, professional staff provides such prompt service and precise maintenance agreements. Moreover, our experts are fully capable of repairing most makes and models, including Allied Air units, so you can count on us to get the job done regardless of your existing systems manufacturer.