Due　to　individual　differences　in　factors,　there　are　differences　in　thermal　sensation　among　people.　This　study　investigated　the　effects　of　three　individual　factors:　age,　gender,　and　BMI　on　thermal　sensation　based　on　the　Chinese　Thermal　Comfort　Database.　The　relationships　between　the　individual　factors　and　thermal　comfort　were　analyzed　by　thermal　sensation　evaluation　modes　and　neutral　temperatures.　The　effect　of　the　three　factors　were　explored　using　Bayesian　networks.　Furthermore,　the　reasons　why　individual　factors　affect　thermal　sensation　were　discussed.　The　results　indicated　that　there　are　significant　differences　in　thermal　sensation　of　personnel　by　age,　with　the　highest　thermal　neutral　temperature　of　21.5　degrees　C　for　the　elderly,　and　the　neutral　temperature　increased　with　age.　There　are　statistically　significant　differences　in　thermal　sensation　between　genders,　and　female　have　a　1.3　degrees　C　higher　thermal　neutral　temperature　than　male.　The　thermal　neutral　temperature　increased　with　increasing　BMI　of　personnel,　and　the　difference　in　thermal　sensation　between　different　BMI　subjects　was　not　statistically　significant　at　the　5　%　level.　Considering　the　majority　of　the　people,　age　has　the　greatest　impact　on　thermal　comfort,　followed　by　gender　and　then　BMI.　Individual　differences　in　thermal　sensation　are　caused　by　physiological,　psychological,　and　lifestyle　factors.　It　is　recommended　to　select　subjects　with　appropriate　BMI,　while　considering　the　age　of　the　subjects,　in　order　to　reduce　the　effects　of　individual　factors.