... and Kitchen Cookers. With just 150 parts per million (ppm) in the air, you will suffer slight headache, tiredness, dizziness and ... , produced when gas, oil, solid fuel appliances or even cars are in operation. Greater amounts are produced if there is inadequate ventilation ... , overtired, have a headache, dizziness or nausea, or have pains in the chest or stomach seek medical advice. For your appliance ...