This　study　addressed　the　effect　of　stable　mechanical　airflow　generated　by　floor　fans　on　thermal　comfort　zone　in　hot-humid　conditions.　36　college　students　were　tested　in　two　adjacent　offices　with　identical　dimensions　and　layout.　In　hot-humid　environments　(26,　29　and　32 °C,　with　relative　humidity　of　40–60%　and　70–90%),　the　subjective　perceptions　were　investigated　with　air　speed　from　0.05　to　2.0 m/s.　Subjects　reached　neutrality　at　26 °C　without　airflow,　at　29 °C/55%　with　air　speed　of　0.4 m/s,　at　29 °C/85%　with　1.2 m/s,　and　at　32 °C/55%　with　2.0 m/s.　At　32 °C/85%,　thermal　sensation　remained　warm　even　at　a　high　air　speed　of　2.0 m/s.　As　air　speed　elevated　from　0.05　to　1.6 m/s,　the　neutral　temperature　increased　from　26.3　to　29.7 °C　with　humidity　of　40–60%,　from　26　to　27.7 °C　with　70–90%.　Accordingly,　the　upper　temperature　limit　for　90%　acceptability　extended　from　27.7 °C　to　31.3 °C　and　from　26.9 °C　to　28.6 °C,　respectively.　©　2023,　The　Author(s),　under　exclusive　license　to　Springer　Nature　Singapore　Pte　Ltd.