Regarding Temperature, Tetenal says multiply time with 0.85 for 22°C and 0.65 for 24°C. Have you had a look at Agfas website, Data sheets, you should find time versus temperature curves for Agfa films in Agfa developer. (http://www.agfaphoto.com/library/datasheet/film/index.html)(posted 8501 days ago)Refinal is said to be a compensating developer and most films can be used with same time. Look into the Agfa datasheet for b&w processing. I do not have personal experience with it, as I use two bath developers. Calbe A 03 is said to be similar.
Regards,
Wolfram