system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How are ovens able to cook at a lower temperature /faster by being fan assisted?
gpt
that is the difference between a conventional oven and a convection oven (one with a fan). the fan does two things. The first is it mixes the air in the oven, so you get a more even temperature throughout. This helps things cook more evenly. The biggest difference, though, comes from the flow of air through the oven. Moving fluids, be they gas or liquid, transfer heat faster that stagnant fluids. Stagnant air is often used as insulation. Conventional ovens do have some airflow due to the slight temperature differences between the top and bottom of the oven and having a heating element on the bottom, but this is minor compared to convection ovens.


TL;DR faster moving air transfers heat better than slow or non-moving air so a convection oven cooks faster than a conventional oven.