Home/Respiratory/HME/Heat and Moisture Exchanger with Filter/Heat and Moisture Exchanger with Filter Thermovent® 23 mg at 34° C for 500 mL Tidal Volume, 18 mg at 34 degree C for 1000 mL Tidal Volume 1.0 hPa at 0.5 L per Second, 2.5 hPa at 1.0 L per Second, 4.0 hPa at 1.5 L per Second002865