What is Heat and speed settings?
Independent controls for temperature and airflow.
Short answer
Single combined 'low/high' switches limit control — prefer separate sliders.
Heat and speed settings when buying a hair dryer
Independent controls for temperature and airflow.
Why it matters: Fine or damaged hair needs low heat; thick hair needs high airflow. You want to mix both.
Look for: Single combined 'low/high' switches limit control — prefer separate sliders.
Full Hair Dryer buying guide