Fireplace Liner Sizing Guide

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.

Fireplace liner sizing guide.

Determining fireplace liner sizing. Figure the opening for the fireplace. 10 of the fireplace opening area but with a minimum size specified. In the example they use a 36 width.

Not all stainless steel chimney liners are considered all fuel liners. Area length x width. This can cause smoke to pour out of the stove and it can also cause gas and oil appliances to fail. Find the width of the fireplace opening on the chart look for step 1 at right.

Click below to calculate the area needed for fireplace liners of various shapes. Undersized liners will not allow the appliance to vent properly. Measure the height and width of your fireplace opening inside your home. Up to 600 sq.

The ideal flue size is typically determined by the exhaust outlet of the stove or appliance. A 10 1 ratio should be used for chimneys less than 25 feet in height and a 12 1 ratio for chimneys greater than 25 feet in height. The federal hous ing administration fha requires flue liners 1 8 the area of the fire place opening if the chimney is less than 15 feet tall 1. Anon ratio of fireplace opening dimension to chimney flue size a reasonable rule of thumb giveing the ratio of fireplace opening size to the cross sectional area of the fireplace flue vent opening is 10 to 1.

Steps to calculate a fireplace liner size. Figure the opening for the fireplace. For an exterior chimney the liner must be insulated if the chimney area is 2 times the area of the liner. Area length x width x 1 2.

Area length x width 12. Measure the height of your chimney from the top crown of your chimney to the top of the smoke chamber inside your chimney. The ubc allows round flue liners to be only 1 12 the area minimum 50 square inches but requires 1 10 the area minimum 64 square inches for square or rec tangular liners. 9 601 760 sq.

Open fireplace liner sizing guide the chart below uses a 10 1 ratio. In the example above they use 30. Height ft step 2. Gas burning should use 316l 316ti or al29 4c stainless steel chimney liners.

Figure the opening for the fireplace. The rules are this for an interior chimney within the building envelope the liner must only be insulated if the chimney flue is greater than 3 times the area cross section not total area of the chimney liner area. Find the height of the fireplace opening. Measure the exhaust collar of the appliance.