tony i'm home and do not have yor email here. please, could you send to us the complete data sheet of the dryer of 8 m3/h- 8nf and 17m3/ 15nf? we already decide to buy from you one GA 37- 7,5 with inverter and another witouht inverter. wthat is the best price you can do? also, we need the filter to put before and after dryers. my email is jc@hidracor.com.br