Do all space heaters, boilers, water heaters, and fireplaces produce carbon Monoxide?
All gas, oil, and coal appliances can produce acceptable levels of carbon monoxide. Appliances that are properly vented should never produce detectable levels and internally should produce less than 100 ppm of carbon monoxide. Un-vented appliances do give off carbon monoxide into the area; therefore the level that they produce should be 50 ppm of carbon monoxide or less. These appliances should only be operated with proper ventilation an for short periods of time.
