Smiths Medical Heat and Moisture Exchanger 30 mg at 34 degree C for 500 mL Tidal Volume, 27 mg at 34 degree C for 1000 mL Tidal Volume 1 hPa at .5 L per Second, 3 hPa at 1 L per Second, 5 hPa at 1.5 L per Second – 2841