LV100PC Ref: 90846AW. LV100H Ref: 90848AW. XPELAIR 100MM 4" FAN WITH UNIVERSAL MOUNT KIT. LV100 fans. LV100 Ref. PULL CORD MODEL OPERATED VIA INTERNAL PULL SWITCH ATTACEHD TO FAN. • Automatic On/Off operation by integral humidity sensor, adjustable from 50-90% RH.