Radio fans often call such stations "flamethrowers" or "blowtorches" because of their high power. After Primus started producing blowtorches he also decided to make paraffin oil/kerosene cookers. Other tools like blowtorches will burn their fuel externally to generate heat. Early blowtorches used liquid fuel, carried in a refillable reservoir attached to the lamp. Ross Tayor, CEO of Fletcher Building, confirmed blowtorches were being used at the time. Modern blowtorches are mostly gas-fuelled. Blowtorches are used to brown and sear food cooked by low-temperature sous-vide techniques.