Users' questions

What size flue do I need for a gas fire?

What size flue do I need for a gas fire?

The minimum flue size is 5″ in diameter. Again, expect to have a flat wall in your room. This flue type will accept the shallower gas fire type. In certain circumstances, your home may not have any of these flue types.

What determines the size of a fireplace 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.

Can a fireplace flue be too big?

When a flue is too big, the chimney can be too cold. Cold chimneys make keeping a fire lit more difficult. They also lead to condensation and possible mold inside the chimney brickwork. They key to making and keeping a great draft in your fireplace is making sure the proper sized flue is installed.

Do I need to line my chimney for a gas fire?

A chimney liner is obligatory if you are installing a woodburning stove, gas fire or open fire in a new build property to comply with Document J of current Building Regulations. A chimney liner may be necessary in an older property if the flue inside your chimney is no longer safe to use.

Does a gas log fire need a flue?

The simple answer is yes, and that’s for safety reasons. A flue is necessary to effectively and safely remove harmful gases – such as carbon monoxide – which are created when the gas fuel is burnt. They are safely transported into the air outside the home.

What is the standard size of a fireplace?

The standard size of a fireplace is anywhere from 2 – 3 feet wide, 24 – 29 inches high, and always about 16 inches deep. Of course, the opening could vary depending on your style and design ideas, as well as where you are locating the fireplace.

What is the average chimney flue size?

Masonry Flues

Flue Size Common Venting Uses
Outside Diameter (inches) Inside Area (square inches)
7 1/2 X 7 1/2 31 Stoves, Central Heaters
8 1/2 x 8 1/2 41 Stoves, Central Heaters
8 1/2 X 13 70 Stoves, Fireplaces, Central Heaters

What size flue pipe do I need for furnace?

The Right Size Flue Pipe The pipe you purchase should match the inside diameter of the hole. It can be larger but must never be smaller or leaks will result. The average stove and furnace today requires a 3 inch diameter pipe, but can go as large as 8 inches. A pellet stove needs only a 4 inch pipe.

What is the standard size of a chimney flue?

Masonry Flues

Flue Size Common Venting Uses
Outside Diameter (inches) Inside Area (square inches)
8 1/2 X 13 70 Stoves, Fireplaces, Central Heaters
13 X 13 99 Fireplaces
13 X 18 156 Fireplaces