is most important to be sure combustion equipment is maintained and properly adjusted. Vehicular use of CO should be carefully managed adjacent to buildings and in vocational programs. Additional ventilation can be used as a temporary measure when high levels of CO are expected for short periods of time.
 
Keep gas appliances properly adjusted.
Consider purchasing a vented space heater when replacing an unvented one.
Use proper fuel in kerosene space heaters.
Install and use an exhaust fan vented to outdoors over gas stoves.
Open flues when fireplaces are in use.
Choose properly sized wood stoves that are certified to meet EPA emission standards. Make certain that doors on all wood stoves fit tightly.
Have a trained professional inspect, clean and tune-up central heating system (furnaces, flues and chimneys) annually.
Repair any leaks promptly.
Do not idle the car inside garage
						

							
Dear student 
Carbon monoxide is a by-product of combustion, present whenever fuel is burned. It is produced  by common home appliances, such as gas or oil furnaces, gas refrigerators, gas clothes dryers, gas ranges, gas water heaters or space heaters, fireplaces, charcoal grills, and wood burning stoves.
 
A major industrial source of CO is producer gas, a mixture containing mostly carbon monoxide and nitrogen, formed by combustion of carbon in air at high temperature when there is an excess of carbon. In an oven, air is passed through a bed of coke. The initially produced CO2 equilibrates with the remaining hot carbon to give CO. The reaction of CO2 with carbon to give CO is described as the Boudouard reaction. Above 800 °C, CO is the predominant product:
CO2 + C → 2 CO (ΔH = 170 kJ/mol)
Hope this helps 
Good Luck