Chimney Liner Sizing Guide

A cross sectional area of chimney m 2 q volume of flue gases at chimney.

Chimney liner sizing guide.

Design velocities of larger furnaces should not exceed 10 m s. To be safe we recommend a 10 1 ratio for chimneys less than or equal to 25 feet in height and a 12 1 ratio for chimneys greater than 25 feet in height. Chimney draft chart pdf chimney area. In any situation you should first consult the manufacturers instructions of your appliance before installing a liner.

The liner size is the number one factor for the appliance to burn properly. Guide is a great way for anyone to choose the correct size liner and also the correct type of stainless steel. Choose the type of appliance you have. Undersized liners will not allow the appliance to vent properly.

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. Model tlc hart cooley chimney sizes 5 through 14inches in diameter require 2 inches of airspace clearance to combustible construction. 16 liner the standard 10 1 ratio has been used in the chart above. The velocity of air and flue gas in a smaller furnace should not exceed 2 m s.

Sizing handbook application guide chimney gas vent for capacities to 100 million b t u. The ideal flue size is typically determined by the exhaust outlet of the stove or appliance. Required chimney area can be calculated as. Rockford chimney supply s chimney liner size calculator amp.

For single category 1 appliance. In a few simple steps you ll be able to see your options for chimney liner size and type. Stainless steel chimney liners while offering unrivaled customer service for the best buying experience. Use this tool to quickly calculate flue diameter or btu s for single or multiple category 1 appliance venting.

For satisfactory performance of appliances in confined spaces and for the venting system an adequate supply of fresh air must be provided. The chimney liner should never be undersized for any appliance especially to accommodate insulation around the liner. Measure the width and length of the chimney flue on top of your chimney to make sure the liner size required will fit down the flue. It is intended for the convenience and assistance of.

So when calculating the venting capacity of a square or rectangular clay chimney flue tile or liner by looking at its cross section we use the umc s table c9 g of round chimney flue equivalents to get the effective chimney flue vent cross sectional area before we enter the masonry chimney btuh venting capacity tables 6 9 c single wall flue vent connectors and single heating appliances or 6 9 f single wall flue vent connectors and multiple appliances. The primary aim of this sizing handbook is to provide more detailed guidance on appliance venting than can be found in the codes or in appliance manufacturers instructions. This can cause smoke to pour out of the stove and it can also cause gas and oil appliances to fail.