Final answer:
The two common methods for measuring airflow in residential systems are the handheld anemometer and the Pitot tube, which are both specifically designed to accurately gauge airflow.
Step-by-step explanation:
Methods for Measuring Airflow in Residential Systems
Two common methods for measuring airflow in residential systems are the handheld anemometer and the Pitot tube. A handheld anemometer is a device that measures the speed of airflow. It typically consists of a set of cups or vanes that spin in the wind; the speed of which determines the air velocity. The Pitot tube, on the other hand, measures fluid flow velocity by converting the kinetic energy in a fluid flow to potential energy. It does so by capturing the fluid in a tube facing the flow, and comparing the pressure against a baseline static pressure in the fluid. These methods are specifically designed to gauge airflow accurately and are preferred over other methods such as using thermistors or capacitive sensors which are better for temperature and humidity measurements, or non-instrument techniques like duct tape and string, which are not quantitative.