Stainless Steel Chimney Liners For Oil And Gas Furnaces
DIY And Save
Thinking of purchasing a stainless steel chimney liner, but have no idea where to begin? DIY chimney relining can save homeowners hundreds and even thousands of dollars. Taking the right measurements and asking the right questions can make relining a chimney a piece of cake.
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For All You Wood Burners.
If you are using a wood burning appliance such as a wood stove or traditional fireplace, first start by finding out the height of the chimney. To do this drop a tape measure down the chimney until you hit the bottom. If you do not have a tape measure long enough, a long length of rope can be lowered down. Mark and measure the rope. This will tell you the length of the chimney liner you will need.
The next measurement to get will be the inside measurement of the current chimney flue. Make sure to take a bright flashlight and really take a good hard look at the inside of the flue, checking for any inconsistencies inside the flue. Remember just because the top of your chimney might measure 7 inches by 11 inches doesn’t mean it’s going to be that same measurement at the bottom of the chimney. Shifting clay flue tiles and sloppy mortar are two of the common protrusions inside a chimney flue. Also, check to see if your chimney has any offsets or turns.
To figure out the proper diameter for a wood stove, check the sizes of the exhaust hole on the wood stove. Whatever the size the exhaust hole is on a woodstove will dictate the size of the chimney liner. Just because the current chimney flue is 13”x13”doesn’t mean you need to put the largest size chimney liner possible. Today, wood stoves are being made to work more efficiently. The higher the efficiency of an appliance is generally requires a smaller chimney flue. When choosing the diameter of a chimney liner, make sure to go by the stove, and not the chimney.
When using a fireplace insert, check the size of the throat damper. Typically fireplaces have a damper above the fire box. Throat dampers will create a choke point that might prevent the chimney liner from reaching the appliance. To get around this issue, a chimney liner can be shaped to fit around the damper or the damper can be removed. If you are using a freestanding wood stove, get a measurement of the thickness of the chimney wall. This will tell us how long the pipe has to be to pass through the wall.
For You Gas And Oil Burners
Information that needs to be gathered to get the appropriate chimney liner for an oil furnace will be similar to the wood burning appliance noted above- the height of the chimney and the inside flue measurement. However, you will need to know the GPH (gallons per hour) firing rate of the appliance. Oil appliances tend to be more efficient than wood burning appliances. Knowing the efficiency rating can help not only to size the liner, but also will help to get the appropriate grade of chimney liner. Higher efficiency appliances create a cooler flue temperature, but in return have a much more corrosive emission. 87% and higher efficiency rated appliances will suggest the use of an AL29-4C stainless steel chimney liner. This will come with a longer warranty. To size the chimney liner, the lateral length from the appliance to the chimney will be needed. The same will be true for gas fired appliances; however, the BTU output of the gas appliance is necessary. Just like the wood burning appliances, make sure to check the thickness of the chimney wall when dealing with gas and oil appliances. Getting a little information about your furnace or heater can make a big difference when trying to figure out which chimney liner is needed for your job.
Height of the chimney
Inside measurements of the chimney
Size of exhaust hole of the appliance
Thickness of the chimney wall (when dealing with free standing wood stoves and gas or oil appliances)
Check to see if there is a throat damper
BTU output of the appliance (gas appliances only)
Gallons per Hour (GPH) firing rate (oil appliances only)
When doing any kind of work on a chimney, make sure you take all the appropriate safety precautions, and have someone of the roof with you at all times.