Her landlord pays for internet?

Adequate ventilation is necessary for safe operation of the kerosene heater. Burning kerosene consumes oxygen and produces carbon dioxide, sulfur dioxide, nitrogen dioxide, carbon monoxide and other gases. Ventilation must be provided to replace oxygen as well as to remove gases in order to prevent asphyxiation or respiratory problems. The manufacturer'* recommendations should be followed to provide adequate oxygen for combustion; in many instances, this may require opening a window or a door leading to another room. If no specifications are listed in the manufacturer'* literature, one rule of thumb is to provide 1 square inch of window opening for each 1,000 Btus of the heater rating. An example -- a 10,000 Btu heater may require opening an outside window 10 square inches to provide the necessary air intake. In an energy efficient home, additional air intake may be necessary.