The Berner 66VS-003EB Extension Bracket is designed to enhance your installation by extending mounting holes by 3 inches on either side of the door opening. This factory-installed bracket is compatible with IDC12 and IDC14 models, providing a secure and reliable fit. Please note that it is not suitable for electric heated units or those with factory-mounted controls. Ideal for optimizing door frame configurations, this extension bracket ensures a seamless installation process.