How to Make a Secondary Combustion Wood Stove

It is really crucial to increase the efficiency of a wood-burning stove. Especially if you are using the stove to heat up your space daily, you will obviously prefer the quickest performance during the coldest hour. Well, building a secondary combustion wood stove will help you to boost the performance. Secondary combustion wood stoves are designed to develop the secondary combustion of smoke and gases. The advantage of these stoves is that they have a very high thermal efficiency rate. This means that most of the heat goes into heating your space and the remaining amount goes into heating up the stove.

You can make a secondary combustion wood stove by following some simple steps. You will need some materials like a metal can, a drill, and some rocks. First, you will need to make a hole in the bottom of the can. Then, you will need to put the rocks in the can. After that, you will need to put the can on the fire. The fire will heat up the rocks, and the rocks will help to make the secondary combustion.

How To Make A Secondary Combustion Wood Stove

How to Make a Secondary Combustion Wood Stove

Secondary combustion is a process that helps to improve the efficiency of your traditional fireplace. It does this by boosting the heat output and preventing blackening. Additionally, it can reduce emissions and provide other benefits.

We have taken an old log burner stove for an upgrade. This is pretty old and needs to be clean up first. So, we focused on that part before diving into anything else. There were lots of ashes and burnt woods; we took them out properly. The chimney also required some cleaning up, and so we cleaned that too. Once everything is cleaned up, you will have to focus on installing secondary combustion system. This will make sure that your stove is burning in an eco-friendly way. You might also want to add some new doors or glass panes.

Secondary combustion is also known as secondary burn

The Steps of Installing a Secondary Combustion

Step 1

Now, we will take out the door and drill some holes in it. This will allow us to install the wooden combustion in it. At the entrance spot, we have made three 12 ½ inches holes. We are gonna install the steel pipes in it. It will be the main setup, and that’s why we have used 10mm thick pipes in it.

Step 2

Next, we have taken a wooden log and created holes so that it can pass the air. You can use a different drill bit if you want or use the same drill for making the holes. Now we have taken a foam sheet and covered the log from all sides, including the holes. We have used white duct tape for it. You can use different colors if you want. Next, we have taken blue tape and made lines over the log.

Step 3

After that, we have to improvise the jig to attach a nut to the pipes. You can simply use a bearing to weld the arms properly. Once you weld the nuts inside the short pipes, check properly if everything is properly set or not.

Step 4

we have taken a wooden log and created holes so that it can pass the air

Now, use a square pipe of 60/60 mm dimension for making the base of the combustion. Then create the holes inside of it. We have already made the holes based on the size of the small pipes.

Step 5

Once you install the small pipes, close the air dispenser properly by welding the sides. Make sure to create some air gaps and a small gap at the bottom of the combustion chamber. It will help you to prevent the smoke from the front glass and keep it clean. These small holes will also help to keep the air clean.

Step 6

Now that the design of the combustion is complete, you have to install it on the stove. We have already created some holes by using the drill and going to use them for the attachment. Take your combustion chamber and attach it to the door by using the drill spots. Once you complete the installation, your stove is ready to use with


Hopefully, you have understood the process of installing a secondary wood combustion chamber. If you have any questions or have some enhanced ideas for setting up the combustion chamber, you can send them to us through the comment section below.

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Jennifer Branett
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