Here are some tips to help you keep your temperatures manageable. 1  Do not let your grow room exceed 86Â° F. Keep it between 70Â°-86Â° (21Â°-30Â° C) 2  Heat rises. So place air intake vents as low as possible in the room and exhaust vents as high as possible. 3  Circulate the air in your grow room to keep temperatures even.
Quick Answer. Perms can take between 1 and 2 hours, depending on how long the hair being permed is and what perming technique is implemented by the stylist. Once complete, a perm is not completely settled until about 28 hours have passed. Keep Learning.
Once it is filed, the U.S. Department of Labor (DOL) estimates processing times of up to 60 days. Historically, PERM processing timeframes have ranged from a few days to more than six months. If there is an audit by the DOL, there would be an extended delay.