In the United States, chimney (vent) sizing is governed mainly by NFPA 211 (solid fuel), NFPA 54 / ANSI Z223.1 (gas), and UL listings for the chimney or vent itself. Sizing is driven by appliance outlet diameter, BTU input, fuel type, draft type (natural, induced, direct vent), and elevation. 

Your chimney pipe must extend at least 3 feet above the point where it exits the roof and at least 2 feet higher than any part of the roof or structure within 10 feet. This is the 3-2-10 rule, required by NFPA 211. Following it keeps your home safe and your wood stove drafting properly.

Yes. If your house has no existing chimney, you can install a wood stove using a Class A insulated chimney pipe system. The pipe runs either straight up through the ceiling and roof (internal route) or out through an exterior wall and up the side of the building (external route). Both methods are code-compliant, safe, and used in thousands of homes every year.

Use double-wall connector pipe when your stove sits near a wall, because it needs just 6 inches of clearance to combustibles instead of single-wall's 18 inches. Use single-wall when you have the space and want cheaper pipe that throws more heat into the room. Both are completely safe at their listed clearances.

Replacing a chimney pipe costs anywhere from $300 to $7,000 or more, depending on the type of pipe, the height of your chimney, and whether you do the work yourself or hire a pro. This guide breaks down every cost factor so you can budget with confidence.

Chimney pipes can last anywhere from 5 years to a lifetime, depending on the type of pipe, the material it is made from, how often you use your stove, and how well you maintain the system. Single-wall black stove pipe typically lasts 5 to 10 years. Double-wall stove pipe can go 15 to 20 years. A quality Class A insulated chimney pipe that is UL 103 HT listed can last 25 to 50 years or more with proper care.

To install a chimney pipe in a multi-story house, use connector (stove) pipe only in the room and transition to a UL 103HT listed Class A insulated chimney at the ceiling support box. The Class A chimney then passes through each floor, attic, and roof with 2-inch clearance to combustibles at every level.

To install a chimney through the attic, connect a stove pipe from your wood stove to a ceiling support box, then transition to UL 103HT listed Class A insulated chimney pipe that runs through the attic and exits the roof. Choose the correct support box length (11", 24", or 36") based on your total ceiling thickness.

You install a chimney through a cathedral ceiling by running stove pipe from the appliance up to a ceiling support box, then switching to Class A insulated chimney pipe (UL 103 HT) for everything that passes through the roof. Because there is no attic, the support box mounts directly to the ceiling framing, and the chimney exits straight through the roof above.

Side-by-side comparison of the top Class A chimney pipe brands in the U.S. - Ventis, DuraTech, Selkirk, and Flue-Pipes.com. Compare materials, UL 103HT certification, warranty, and pricing.