schuerchag4 years ago000so actually the PRO H is for 74m2 ,the PRO was for 60m2Show in original language (German)mytsai704 years ago-202According to my calculation, the 'Pro H' is for 72 m2 compared to the 'Pro'. The difference is simply that the flow rate is 600m3/h instead of 500m3/h.Show in original language (German)Comment