Does a Water Heater Need a Chimney Liner?

Are you wondering if a water heater needs a chimney liner? Installing a liner for your chimney is very important because it keeps your chimney safe and makes it more efficient. If you have just installed a water heater, you might wonder if you need to have a chimney liner for it. We will discuss the answer below.

Does a water heater need a chimney liner? A water heater needs a chimney liner so that it functions properly and also for safety purposes. You must have the right venting and chimney liners so that they can be vented outdoors.

Is it important that the vent pipes meet the code? Can condensation come from an oversized flue liner? Is it ideal to use a stainless steel liner? When should you replace a chimney liner? These are some of the questions that we will discuss. Check out the rest of the article for more tips and information.

What to Know About Chimney Liners

Chimney liners are metal tubes that are installed in chimneys which protects them from condensation. These liners are dropped down from above the chimney which enables the appliance to properly and safely vent. Chimney liners are available in various sizes. Various factors like the height of the chimney as well as the size of the appliances that are connected play an important role when it comes to installation.

The design, engineering, as well as care that is required in the installation of the chimney liner is important for a successful final result. Make sure to hire the services of an experienced professional to get the best results.

Is it Important that Vent Pipes Meet the Building Code?

When it comes to venting pipes installation, make sure that it meets the building code. This is important for safety purposes. Take note that vent pipes are dangerous. There are instances wherein the vent of an orphaned water heater is not inspected. According to the building codes, vents and other fuel-burning appliances should follow a certain size.

For instance, the power plant chimney is filled with cold and dense air. The warm or hot air that comes from the water heater will have a hard time offsetting the falling air that enters your house. If this is the case, exhaust gas can be dragged back to the basement and can cause carbon monoxide poisoning.

Can Condensation Come from an Oversized Flue Liner?

Condensation can come from an oversized flue liner. There are instances wherein the exhaust gas temperature that comes from the heater cannot heat the dense masonry which prevents the formation of condensation. Some flue liner is too big for the water heater which can lead to condensation issues inside the chimneys.

Take note that water vapor can be caused by the combustion of natural gas. In case the inside of the chimney cools down, water vapor can condense and saturate the masonry that is inside the chimney. Condensed water can contain acids that can damage mortars that are poorly made.

Is it Ideal to Use a Stainless Steel Liner?

Ideally, you use a stainless steel liner. You need to consider the needs and requirements of your chimney when it comes to choosing a liner. Moreover, if you have a high-efficient water heater, it is recommended that you use a stainless steel chimney liner.

When is the Time to Replace a Chimney Liner?

The best time to replace a chimney liner is when it starts to crack, malfunction, or deteriorate. Aside from that, when you are upgrading or replacing your water heater or furnace, you must install a brand new chimney liner.

✅ Video – Chimney Liner Installation

Joel Ideas shared the video below on YouTube. It shows how to install a chimney liner. Having a liner for your chimney is important especially if you are installing new heaters. Watch the video below for more information.

Is a Chimney Liner Needed for a New Appliance?

If you are installing a new furnace or water heater, you must also get a new liner. If your water heater is forced to vent through a chimney once the furnace is removed, it is called an orphaned water heater. Bear in mind that for the new furnace or water heater to function properly, your chimney should be large enough so that it can properly expel the exhaust. On the other hand, chimneys should be small enough so that they can create a draft. Hence, you must reline the chimney. To solve this issue, you can install a new chimney liner. 

There are instances wherein chimney professionals only provide you with the quote on the price of the new appliance and not the price of the chimney liner that should be installed to protect your home from toxic fumes. Most of the time, you are required to upgrade your furnace or water heater. Most of the time, carbon monoxide build-up around the water heater cause problems to the home and health. 

How Long Do Chimney Liners Last?

How long chimney liners last will have to depend on a few factors such as the material that the liner is made of. Bear in mind that different liners have different lifespans. For instance, liners that are made from clay tile can last up to fifty years. On the other hand, stainless steel liners have a lifespan of about fifty to one hundred years. Of course, this will also have to depend on the quality grade of the steel.

Moreover, a chimney liner with high quality can last for a long time. Make sure that you consider all of your options when choosing a chimney liner. Rather than purchasing a cheap liner and saving money, you should opt for a high-quality liner that is a bit expensive because it will save you more money in the long run.

What is the Best Type of Chimney Liner?

Various factors such as the type of the chimney, the type of the appliance, and its use will determine the best type of chimney liner for your home. When installing a new chimney for your home or having it re-lined, you first need to gather more information regarding the appliances that you will use. Moreover, you need to read and check the manual so that you can determine if there are certain recommendations for certain types of chimney liners.

How Can You Save Money on Chimney Lining?

To save money on chimney lining, you first need to determine the type of chimney that you have at home. After that, you can search for the best type of chimney liner according to your budget. The size of the chimney in your home will also affect the size of the liner and its price. For instance, having a large chimney system requires a larger liner which is more expensive as compared to a smaller sized chimney system.

Even if you want to save on your budget, you must let professionals do the job rather than doing the project by yourself. Bear in mind that there are building regulations and standards that should be followed when installing a chimney liner. This is necessary to protect the house as well as the residents.

Things to Consider when Installing a Chimney Liner

There are some things that you need to consider when installing a chimney liner which include hiring the services of a professional. Moreover, the chimney must be swept before installing the liner. To make sure that the job is done right, you should hire the services of a professional chimney sweep.

The price of hiring a chimney sweep can be expensive depending on the size and condition of the chimney that you have. The chimney sweeps will do a smoke test to detect any damage and leakage into the chimney. When installing the liner, it should be lowered into the chimney in sections to make sure that it fits properly into the chimney.

Do You Need Planning Permission for a Chimney Liner?

Unless you are installing a new chimney or vent for your house, you do not need to have planning permission for a chimney liner. On the other hand, you need to consider the type of property that you have as well as the current building regulations in your area. A chimney liner can be a legal requirement for your chimney. See to it that you get in touch with your local Planning Office and Building Regulations.


You have reached the end of this article that discusses if a water heater needs a chimney liner. We have found out that you should install a chimney liner if you have a new water heater. This will provide the best heating and will also keep your home safe. Thank you for reading!

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