Paloma Industries has introduced the Model PH-16FS, the first tankless gas water heater equipped with an oxygen depletion safety device. This model also features a film-type overheat limiter, computer control, digital display, self-diagnosis, low emissions, and a very compact size. A digital control panel is included on the cabinet. This model provides endless hot water at 4.2 gpm at 45 degrees temperature rise. Paloma Industries. Circle 2.