Fireplace Liner Sizing Guide

Open fireplace liner sizing guide the chart below uses a 10 1 ratio.

Fireplace liner sizing guide.

Height ft step 2. Measure the height and width of your fireplace opening inside your home. Area length x width. In the example above they use 30.

Area length x width 12. Find the width of the fireplace opening on the chart look for step 1 at right. 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. The ideal flue size is typically determined by the exhaust outlet of the stove or appliance.

In the example they use a 36 width. 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. This can cause smoke to pour out of the stove and it can also cause gas and oil appliances to fail. Up to 600 sq.

Gas burning should use 316l 316ti or al29 4c stainless steel chimney liners. 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. Figure the opening for the fireplace. Undersized liners will not allow the appliance to vent properly.

10 of the fireplace opening area but with a minimum size specified. For single appliances this will be all you need to choose to get the correct size and type of liner for your application. Area length x width x 1 2. For an exterior chimney the liner must be insulated if the chimney area is 2 times the area of the liner.

Steps to calculate a fireplace liner size. Measure the exhaust collar of the appliance. Find the height of the fireplace opening. Click below to calculate the area needed for fireplace liners of various shapes.

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. Figure the opening for the fireplace. Find the intersect of. Determining fireplace liner sizing.

Not all stainless steel chimney liners are considered all fuel liners. Sizing tables 12 multiple appliance vents procedure 15 sizing tables 16 additional guidelines 19 multiple story venting sizing guidelines 21 system examples 22 factory built all fuel chimney systems includes flexible stainless liner sizing description 26 sizing tables 27 table of contents. 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.