i5, versus i3, versus i7 matters less for fan or fanless compared to the product suffix. That's that letter at the end of the name. U, Y, K, H, etc... Which are decoded on this page: https://www.intel.com/content/www/us/en/processors/processor...

The letter indicate the target application, which then impacts the TDP Intel is targeting (slightly dependent on i3/i5/i7, but maybe not at all). U and Y are the big ones to look at for mobile fan vs fanless. Their definition is:

   Y: Mobile extremely low power
   U: Mobile power efficient
   H: High performance optimized for mobile

Here's the ARK link for 4 10th gen i7 with the above 3 letter (plus one desktop CPU): https://ark.intel.com/content/www/us/en/ark/compare.html?pro...

TDP (max power draw) based on letter:

   Y: 7 W
   U: 15 W
   H: 45 W
   KF: 125 W (unlocked, Requires discrete graphics)