absorb outdoor temperature humidity,reduce air conditioner running time for energy saving ambient temperature:- ... 85%ruuning temperature setting:0~+99°C(fan on/off,air conditioner on/off, over temperature alarm)ruuning humidity setting ... :0~99%(gate on/off fan on/off,air conditioner on/off) reliability:fan MTBF≥50000h(40°C ... 485,dry contact alarm Free Cooling System for telecom base station