... housing, instant heating. all copper pipe with different capacity options tankless, energy saving Capacity Options: 6L, 8L, 10L, 12L, 16L, ... /min, 20L/min (25 centigrade temperature rising); Gas Source: LPG, NG, Town Gas Rated gas pressure: 2800 Pa (LPG), 2000 Pa ( NG ... , easy operation; Model of Ignition Methods: Impulse Automatic Ignition; Gas Exhaust Type: Flue duct type; Summer & winter switch for ...