Tampa Heating and Cooling Systems, Industrial Refrigeration, Commercial Air Conditioning & Maintenance - McMullen Air Conditioning & Refrigeration Whether you need a heavy duty Liebert computer room cooling unit, durable Trane Air Conditioners or simply need your HVAC system cleaned and checked for leaks, McMullen is number one in Tampa, St Petersburg, and Lakeland, FL for Commercial HVAC systems Installation and Industrial HVAC Maintenance! McMullen Air Conditioning & Refrigeration has been a trusted name in HVAC installation and service for 58 years. Our service technicians are available 24 hours a day, seven days a week. All of our technicians are EPA certified and factory trained in servicing major air conditioning equipment including Trane, Carrier, McQuay, Lennox, York and Liebert units. We offer several Maintenance Contract plans that will extend the life of your HVAC equipment and reduce operating costs. In addition to service type repairs and maintenance contracts, we also employ a full installation crew. They can do as little as adding a duct run to your office or a complete building install. Whether it’s a full building or a retrofit we have the personnel to meet your needs. McMullen Air conditioning is fully licensed and insured for all aspects of light and heavy commercial services.