I Have Home That Was Built In 2000. Natural Gas Water Heater, And Furnace. How Often To Clean Chimneys?
Natural gas water heaters and furnaces don’t use “chimneys” unless your furnace and water heater are vented into an actual chimney, which is unlikely in a 6 year old home. The things sticking out of your roof are vent stacks. They vent carbon monoxide and unburned gases. There is no reason that they should ever need cleaned.