Residential And Commercial. Licensed And Insured. Sales, Service, Installation, Offering System Cleaning, CMC State Licensed. 24 hours, 7 Day Emergency Service. Clark Heating and Cooling, Inc. is a family-owned business that has been delivering high-quality products and services since 1999. We provide a number of services for both residential and commercial properties and strive every day to leave our customers feeling satisfied and comfortable in their homes or offices year round. In our 19 years of business, we have acquired the knowledge and expertise to deliver excellence with every job.