Here's the list of laptop models/series: Thinkpad, Dell Latitude, HP EliteBook, Toshiba LifeBook. Based on user reports, which laptops produce most and least fan noise, on average? Which ones produce most and least heat during normal use? Write detailed rated summary, with numerical values if available.
It's difficult to provide a detailed rated summary of fan noise and heat production for specific laptop models or series, as these factors can vary greatly depending on the individual laptop's configuration, usage, and environment. However, here are some general observations based on user reports:

Fan noise:

On average, ThinkPad laptops tend to have lower fan noise compared to other laptop models, as they are known for their silent operation.
Dell Latitude laptops have varying fan noise levels, with some models being quieter than others.
HP EliteBook laptops have a reputation for producing higher fan noise compared to other laptop models.
Toshiba LifeBook laptops also have varying fan noise levels, and the level of noise produced can depend on the specific model and configuration.
Heat:

On average, ThinkPad laptops are known for having lower heat production compared to other laptop models.
Dell Latitude laptops have varying levels of heat production, and it largely depends on the specific model and configuration.
HP EliteBook laptops are generally known for producing lower levels of heat compared to other laptop models.
Toshiba LifeBook laptops have varying levels of heat production, and it depends on the specific model and configuration.
It's worth noting that these are just general observations, and the fan noise and heat production levels of specific laptop models can vary greatly depending on several factors.