A cold snap hits your area and you change your thermostat setting to “Heat” for the first time this season. If you do not have warm air blowing out of your vents, it may be time to call a NATE certified Charlotte HVAC contractor for a furnace repair. Why NATE certified? This certification stands for “North American Technical Excellence” and is given to professionals who have completed testing and are proven to be the best in the industry for HVAC services. Patterson Heating and Air’s HVAC technicians are NATE certified, and are committed to providing high quality services, such as furnace maintenance, installation and repairs, for customers in Charlotte and surrounding areas.