... .fresh air ventilator(ERV,HRV) 2. hexagon,counterflow paper core 3. quadrangle,crossflow AL core 4. capacity:150-10000m3/h fresh air ventilator For ... room fresh air handling unit.Keep the fresh of the room ... ,2500 m3/h,3000 m3/h,3500 m3/h,5000 m3/h,6000 m3/h,8000 m3/h,10000 ... core or sensible heat aluminium exchange core. fresh air ventilator