Kerosene heaters are a popular option for providing supplemental heating during cold weather. However, if operated improperly or used indoors without adequate ventilation, they can be very dangerous and create a risk of fires, carbon monoxide poisoning, and other hazards.

One major concern when using a kerosene heater is the possibility of fire. Kerosene heaters generate high temperatures and can easily catch nearby combustible materials on fire if not operated properly. To reduce the risk of fire from a kerosene heater, it should always be kept away from flammable items such as curtains, bedding, furniture, clothing, etc., and should never be left running unattended. Additionally, it’s important to check the unit for any damage or defects before use as these could create an increased risk of fire.

Another danger associated with kerosene heaters is carbon monoxide (CO) poisoning. This occurs when combustion byproducts such as CO build up in an enclosed space due to inadequate ventilation or improper fuel burning. To prevent this hazard when using a kerosene heater indoors it’s important to make sure that there is proper ventilation in the room where the heater is located and never use any fuels other than those specifically designed for use in the unit. Additionally, it’s important to ensure that all vents are unobstructed by furniture or draperies so that air circulation can occur properly around the unit while it is running to prevent CO buildup inside the room.

Finally, another potential risk associated with indoor use of kerosene heaters includes health hazards from exposure to fumes containing toxins such as formaldehyde and sulfur dioxide which can irritate eyes and respiratory systems if inhaled in large concentrations over time. Thus adequate ventilation should always be used when operating these units indoors to help minimize this type of exposure as much as possible. If you experience irritation from these chemicals while using your heater then immediately turn off the unit and ventilate your living space adequately before trying again with proper safety precautions in place.

In conclusion, although kerosene heaters can provide supplemental heating during cold weather they should only ever be used outdoors or in well-ventilated areas where there are no flammable materials present nearby due to their potential risks including fire hazards and carbon monoxide poisoning which could both lead to serious injury or death if not addressed properly beforehand by taking appropriate safety precautions such as ensuring adequate ventilation around the unit at all times while it is running along with keeping all combustible materials away from its vicinity at all times too!