How do I get more airflow out of my vents?

Increasing the volume and velocity of air coming out of your residential supply vents requires addressing system restrictions and pressure drops across your HVAC network. First, check and replace your indoor air filter immediately, as a clogged filter is the most common cause of choked airflow. Second, ensure all supply and return vents throughout your home are fully open, unblocked by furniture, and clean. Third, inspect your accessible basement or crawlspace ductwork for disconnected joints, crushed flexible runs, or closed balancing dampers. Fourth, consider clearing debris from your indoor evaporator coil or upgrading your blower motor fan speed settings. You can troubleshoot airflow velocity using your hand or an anemometer. You can verify that your corrective actions were successful when powerful, steady air rushes out of every supply vent.