Whether you are considering hiring Wm. E. Donnelly for the first time, or one of our long-time valued customers, we want you to know that we believe in quality and integrity in everything we do. We have a long tradition of providing total customer satisfaction in Northeast OH going back to the early 1900s. We offer superior heating and cooling products, installation, and maintenance and repair services. Our goal is to get it right each and every time because our people care and that is what sets Wm. E. Donnelly Heating & Cooling apart from other heating contractors.