... , 10 L/min, 12L/min, 16L/min, 20L/min (25 centigrade temperature rising); Gas Source: LPG, NG, Town Gas Rated gas pressure: 2800 Pa ... device to avoid accident. Water over high pressure protection device; Over freezing protection device; Super low water pressure starting design Flue Type Gas Water Heater, Instant Tankless Water Heater