When installing a new HVAC system, several parts are a must-have to make the system work properly. One product that is essential to your central heating and cooling is the duct register box. Also known as an HVAC boot box, these register boxes are made of galvanized sheet metal and are designed to convert ductwork into a vent to heat a room. In a home, the trunk of the HVAC system either runs through the ceiling or the basement of the home. The trunk consists of the main ductwork line that supplies all the air throughout the house. DK Hardware offers a wide range of register boxes so that your HVAC system runs smoothly without any issues. Register boxes come in a variety of different options. However, the common ones include angled and straight register boxes. An angled register box provides a ninety-degree angle, which allows the ductwork to change directions from horizontal to vertical, whereas the straight register box is used when the ductwork is already running straight and then converts it into a vent. You can also check out some more register boxes on this page and choose the one that best suits your need.