Always On Time...Or You Don't Pay A Dime! Petrie's Heating & Cooling, Inc., promise is "Always On Time, Or You Don't Pay A Dime". In other words, "you cannot lose" when you pick Petrie's One Hour for residential heating, cooling and indoor air quality services. We are one of the largest residential service and repair company in the area. We are fully insured and maintain a Tennessee Contractors license. All of our team members are professionally trained to provide positively outrageous service. In addition, all of our technicians proudly wear the Technician Seal of Safety, which ensures your peace of mind. This means that all our employees have been background checked, drug tested and professionally trained. We are the only HVAC Company in Middle Tennessee that has earned this designation. So if you havent tried Petrie's One Hour before, we would welcome the opportunity to become your HVAC contractor of choice. Were sure youll see what we mean by Positively Outrageous Service!