Hey there stay lifted if 85 is your highest temp you dont have to worry your plants will do just fine even though the blower fan can help tweak your temps down to an ideal range if you cant get ahold of one you should be fine with this grow. Another thing that is going to be very beneficial with any intake system is that you are bringing in enough fresh air every few minutes to replace the air in the cabinet. And with the blower herbal remedy has there is no doubt that the air is being circulated very quickly.