If you have an electric stove, the ideal height for your chimney is 60-80 cm (25-30 inches). The optimal height of the chimney for gas burners is 45-60 cm (18-24 inches). Check that there are no obstacles between your roof and the top of the chimney.
The recommended maximum height for a wood burning chimney is 90 cm (35 inches), but you can choose whatever height you like as long as it's not less than 30 cm (12 inches) and not more than 150 cm (59 inches).
The purpose of the chimney is to draw smoke out of the house and up through the hole in the roof. So the higher the better, as far as ventilation is concerned. However, if the chimney is too high it could be dangerous. There should be at least one person available at all times who knows how to operate the chimney if needed.
Chimneys can be built from stone or brick. They usually look best with a thick wall and a tall crown. But if you want to use cheaper materials or if you do not have much time to spend on building projects, then a chimney made from clay or concrete would be appropriate too.
There are many different types of chimneys.
The biggest concern with chimney height is draft. If the chimney is not tall enough, your fireplace will have a poor draft and will not perform correctly or safely. A chimney that is too short cannot properly vent and might pose a major fire threat to your property. Your local fire marshal should be able to give you an accurate measurement of your chimney. They may even have specific guidelines for how high you can build your chimney.
If your chimney is too low, heavy soot and smoke will build up inside the chimney over time which could lead to chimney fires. Also, if it's not tall enough, cold air will be drawn into the house through the chimney causing major problems for those who live in colder regions.
Chimneys should be built to current code standards. The National Fire Protection Association (NFPA) recommends that chimneys be at least 18 inches tall with a 2-inch base diameter. Chimneys less than this are not safe and can cause serious damage to your home if they collapse. You should also call your local building department to make sure you're following all the latest safety guidelines before you start work on your own house.
Getting a new chimney installed by a professional company will ensure it's done right the first time.
The two-foot, ten-foot, and three-foot rules are the most prevalent. This roughly translates to a chimney being 3 feet higher than the point where it goes through a roof, as well as being at least 2 feet taller than any section of a structure within 10 feet of the chimney. While this may seem like a lot of space for a house with fireplaces, you need to remember that fireplaces are not just decorative elements; they also serve an important function when it comes to keeping your home safe.
The reason your chimney is so tall is because it needs to reach temperatures high enough to burn all the smoke and other byproducts of burning wood or coal for heat. The more height there is above the fire, the faster these products will be burned off. However, there is no real limit to how high a chimney can be while still serving its purpose. Some people build their chimneys up to 4 feet higher than the roofline for just this reason.
However, if your chimney is too tall, it will become a danger to those living in the house next door. Not only does a tall chimney make it harder for people to get inside their houses if there is a fire nearby, but it also creates a public safety issue if it starts to collapse. If a chimney falls on someone, it can cause serious injury or death. There have been cases where people have died after becoming trapped under the rubble from collapsed chimneys.