Hello, I understand the chemicals need to be at 20C (68F). I always ensure all my solutions are at this temp..no drama there. Now on cooler days it is easy to maintain my ambient room temperature at very close to the same temps. However it is mid summer now (temps around 38C-40C+) and, even with the whole house AC on, it is very difficult and expensive to get the room down to anywhere near those temps. So, my question is, whilst I always use my chems at 20C(68F), how critical is the ambient room temp? I can easily get my developing room down to 24C(75F) on most really hot days. Is this ok, or do I need to wait for cooler days to develop my films? Cheers Mal, Oz. (Ilford films, 35mm and 120, Ilford chems, Rondinax 35U and 60 daylight tanks)