The temperature in a classroom that is occupied by pupils or members of the staff of the school, other than an area used for teaching vocational education or for physical activities, including, without limitation, weight lifting, must be maintained at a level which is not less than 65 degrees Fahrenheit and not more than 85 degrees Fahrenheit. Every effort must be made to maintain a comfortable temperature after considering the humidity in each room.
Nev. Admin. Code § 444.56832
NRS 439.200, 444.335