<human>:  What are the key differences between thermal and gas powered ovens?
<bot>: Thermal ovens use energy from an electric or gas heating element to produce heat, while gas powered ovens use a combination of combustion and convection to generate heat. Thermal ovens tend to heat up faster than gas powered ovens, but gas powered ovens usually have more even heat distribution. Gas powered ovens usually require more time and higher temperatures to cook food, while thermal ovens can cook food at lower temperatures with shorter cook times.