Hagler Heating and Cooling. Ozark, AL. We are a professional HVAC contractor and a leader in HVAC service and installation in our community since 2000. We provide heating, cooling, and indoor air quality solutions to our customers with installation, repair, and maintenance in Ozark and the surrounding area. Check us out online: www.haglerac.com. We are currently looking for an. HVAC Service Technician. to join our team, someone with a passion for...