... Water Heater - Clogged Chimney or Flue - Gas, Coal or Wood fire - Boiler or Heater - Car fumes from or in the garage - Portable ... cooking equipment used in enclosed spaces - Portable Gas or Paraffin Heaters and Kitchen Cookers. With just 150 parts per million ( ... drowsy, overtired, have a headache, dizziness or nausea, or have pains in the chest or stomach seek medical advice. For your ...