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.
Chimney liner sizing guide.
Model tlc hart cooley chimney sizes 5 through 14inches in diameter require 2 inches of airspace clearance to combustible construction.
Undersized liners will not allow the appliance to vent properly.
Rockford chimney supply s chimney liner size calculator amp.
Measure the exhaust collar of the appliance.
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.
A q v 3 where.
It is intended for the convenience and assistance of.
For single category 1 appliance.
For satisfactory performance of appliances in confined spaces and for the venting system an adequate supply of fresh air must be provided.
Open fireplace liner sizing guide the chart below uses a 10 1 ratio.
A cross sectional area of chimney m 2 q volume of flue gases at chimney.
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.
Required chimney area can be calculated as.
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.
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.
Guide is a great way for anyone to choose the correct size liner and also the correct type of stainless steel.
Use this tool to quickly calculate flue diameter or btu s for single or multiple category 1 appliance venting.
Stainless steel chimney liners while offering unrivaled customer service for the best buying experience.
In a few simple steps you ll be able to see your options for chimney liner size and type.
Design velocities of larger furnaces should not exceed 10 m s.
The liner size is the number one factor for the appliance to burn properly.
16 liner the standard 10 1 ratio has been used in the chart above.
The ideal flue size is typically determined by the exhaust outlet of the stove or appliance.
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.
Choose the type of appliance you have.
Chimney draft chart pdf chimney area.
