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Chimney BTU Calculator

Use this tool to quickly calculate flue diameter or BTU’s for single or multiple category 1 appliance venting

For Single Category 1 Appliance

Calculate Flue Diameter →
Calculate BTU’s →

For 2 or More Category 1 Appliances

Calculate Flue Diameter →
Calculate BTU’s →
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Our customers remain loyal because we craft
the highest quality venting solutions while offering
unrivaled customer service for the best buying experience.