... systems or industrial heat-recovery systems High tightness and strength thanks to double folding of the intake- ... counterflow, ABS frame instructure,the dimmensions are 450*250,380*230,750*450,120*200.For sensible heat ... epoxy,crossflow,the dimmensions are 150*150,200*200,250*250,300*300,340*340,350*350,400*400, ... *600,225*650,225*700,225*750,250*700,250*750,250*800 and so on,the length you can disignate. ...