When sizing a fireplace for a square or rectangular liner the 1/10 ratio should be used. This means that the area of the liner should be 1/10th of the fireplace opening. So in the example above where the fireplace had 1080" of area, it should be divided by 10 which means a liner with 108" of area is needed.
How long should a chimney liner be?
The answer to this question depends on the type of chimney liner you have. Clay tile liners and cast-in-place liners typically last around 50 years. Stainless steel flue liners generally last for 15 to 20 years (though low quality liners may not even last for five).
How do you size a chimney pipe?
In general, flue size should be 25 percent larger than the size of the stove pipe, which connects the stove to the chimney. This means a stove with a 6-inch diameter pipe would require at least an 8-inch flue; an 8-inch stove pipe requires a 10-inch flue, etc.
What is the outside diameter of a 6 inch chimney liner?
6.25 inch
How do you calculate what size chimney liner you need?
When sizing a fireplace for a square or rectangular liner the 1/10 ratio should be used. This means that the area of the liner should be 1/10th of the fireplace opening. So in the example above where the fireplace had 1080" of area, it should be divided by 10 which means a liner with 108" of area is needed.
How do you size a chimney flue?
The ideal flue size is typically determined by the exhaust outlet of the stove or appliance. The rule of thumb for sizing a chimney liner is that you never want it to be smaller than the appliance exhaust hole and you don't want the liner to be three times the area of the exhaust hole of the appliance.
What size chimney liner do I need for an oil furnace?
For Hot Water Heaters and Oil Furnaces the ideal diameter of the liner needed to vent your appliance is the size on your unit. For example, if it has a 6" opening where the pipe is to be inserted, that is the ideal size liner you need.