If you are considering your health this winter it might be a good idea to take a look at your heating system. Most electricians who are experienced with gas will tell you that even though unvented gas heaters seem to be popular, they produce not only carbon dioxide, (CO2) but carbon monoxide (CO) and nitrogen dioxide (NO2).
The health hazards of CO are many and dangerous, since it is considered a toxic gas. Any form of heating that is unvented means that the products produced from burning the fuel remain in the room or the whole house. So if you have a gas heater with no vent, you are at risk of carbon monoxide poisoning, especially if the heater is left on all night and there are few cracks or gaps in the house to let fresh air in and poisons out.
Carbon monoxide is colourless, tasteless, non-irritating and odourless so you won’t even know you are being poisoned. In fact, it is said to poison more people than all other poisons put together and most of this can be attributed to unvented gas heaters or even vented ones that burn incorrectly due to any number of things such as rust on the burner or the improper placement of artificial logs. CO causes both brain damage and organ damage.