New rules are being put in place regarding HVAC changes, including refrigerants, energy efficiency, and the installation of new heating and cooling systems. These changes may affect the parts and components an HVAC company in Durham is able to install, the types of refrigerant that can be used, and the cost of certain repairs or ... The post New HVAC Regulations Homeowners Should Know Before Their Next Repair   appeared first on KHTS Radio. ...read more read less