The "Carpathia"s lower decks were well-ventilated by means of deck ventilators, supplemented by electric fans. The ventilation systems were designed to force fresh air over coiled thermotanks, which could be fed with cool water during the summer or steam during the winter, thus heating and cooling the ship as conditions warranted. Although the ship was fully electrified with over 2,000 lamps, the ship still had backup oil lamps in the cabins when she entered service, in the event an electrical outage was to occur.