A-Z Heating & Air Conditioning

A-Z Heating & Air Conditioning has served Lawrenceville and the greater Gwinnett County area since 2004, operating as a licensed residential HVAC contractor. The company maintains a 3.7-star rating across 12 verified customer reviews, with technicians available 24 hours a day, seven days a week for emergency calls. Beyond Lawrenceville, service calls extend to nearby communities including Duluth, Suwanee, and Buford, providing both routine maintenance and urgent repairs to homeowners throughout the northern Atlanta suburbs.

Unlike larger metropolitan HVAC companies, A-Z Heating & Air Conditioning operates with a lean team that emphasizes direct technician-to-customer communication. The company website currently displays a placeholder, indicating limited digital marketing presence, but service records and customer feedback confirm expertise across major residential brands including Carrier, Trane, and Lennox systems. Technical certifications include EPA 608 refrigeration handling, and the business carries full liability insurance for residential service calls.

Customer reviews highlight two technicians by name: Mike, who received praise for punctual arrival and thorough diagnostic explanations, and Jon, who solved a complex cooling failure on Independence Day weekend by cleaning severely clogged condenser coils. One reviewer described watching Jon work in extreme heat while her husband waited in the car due to breathing difficulties, noting the technician completed the job without pause. The positive 5-star reviews uniformly praise diagnostic skill and respectful household protocols, while the single 1-star review addresses an unrelated road incident with a company vehicle.