Annual inspections of chimneys, fireplaces, and vents are recommended by the National Fire Protection Association to prevent fires, carbon monoxide poisonings, and to ensure safe and efficient operation of your fireplace, home heating system, and solid-fuel appliances. Most folks consider their fireplaces and chimneys to be indestructible parts of their home that require little or no maintenance. While masonry work is generally as close to maintenance-free as you can get, fireplaces and chimneys are more than just works of masonry: they are a part of your home's heating system, which must effectively exhaust fumes from your fireplace, furnace and water heater.