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.
Bad Perm Solutions. Wash your hair immediately. Most perm formulas need 28 hours to neutralize, which is why stylists recommend waiting 48 hours before shampooing. If you want to undo the results of a perm, use a nourishing shampoo and conditioner to cleanse and hydrate your hair.