Ohio based contractors in Poland, Ohio

Certified National Service (CNS) is a premier general contracting company that stands out among national competitors by prioritizing quality and personalized attention. We ensure that each client receives the meticulous care and detail we promise from the very start of our business relationship. Our commitment to excellence means we limit customer acquisition to maintain our high standards of service.Services: CNS specializes in the maintenance and servicing of all types of HVAC-R equipment and manufacturers across the United States, including Hawaii and Canada. We cater to a diverse client base spanning various markets such as retail, commercial, industrial, and institutional sectors.Programs: