Is a chimney necessary for all stoves and fireplaces?
All wood burning appliances need a chimney, and it must be two feet higher than anything within 10 feet horizontally. This kind of chimney works best when it is inside a house, traveling through the highest roof point, especially if it is a seep roof. Chimneys 1 and 2 both meet the 10 ft/2 ft rule, but the chimney going through the higher part of the roof is a better design. It is easier to clean, and the exhaust is kept warmer until it exits the house, making the unit more responsive to air changes, and less spillage of smoke in the house. Chimney no. 3 needs to be at least 12 to 15 feet away from the higher roof where chimney no.1 is located, for chimney no. 3 to work properly. If not installed this way, chimney no. 3 may cause down drafting and smoke spillage into the house. Gas appliances will not need a chimney if the appliance is vent free. These appliances burn so cleanly that only carbon dioxide and water vapor enters the home. Each unit also has an oxygen depletion sensor, so
