My Heat Hog runs for a while, then shuts off. How do I prevent this?

The heater uses air (oxygen) from the area in which the heater is used. Adequate combustion and ventilation air must be provided. Due to the Oxygen Depletion Sensor (ODS) safety feature, the heater may shut-off due to lower levels of oxygen. If this happens, provide fresh air, wait 5 minutes and re-light.