As far as I’m aware, these models include the S9, L3+, T9, T17, S17, and S9 series. Although it is possible to run machines between 0C and 40C (32F – 104F), most miners prefer to operate above 5 C (41F). Bitmain recommends an ambient running temperature between 15 – 35C (59 – 95F).
Read more: Bitmain Antminer S9 Series Normal Operating Temperature Range