Understanding Double-Wall vs. Single-Wall Stove Pipe

Author: Sean Summers, NFI Master Hearth Certified Technician – WoodstovePro.com

When it comes to venting your wood stove, the type of stove pipe you choose makes a big difference in safety, performance, and efficiency. Homeowners often ask: “What’s the difference between double-wall and single-wall stove pipe—and which one do I need?”

Here’s a clear breakdown to help you make the right choice for your installation.

What Is Single-Wall Stove Pipe?

Single-wall stove pipe is made from one layer of heavy-gauge steel and is used to connect your wood stove to the chimney system within the same room. It’s affordable, durable, and radiates more heat into the living space—making it a great option when clearance and aesthetics allow.

However, single-wall pipe requires at least 18 inches of clearance from combustible materials (like walls, ceilings, and furniture). It also cools down faster, which can increase creosote buildup over time.

Best for: Open rooms with adequate clearances and homeowners looking for a cost-effective, high-heat option.

What Is Double-Wall Stove Pipe?

Double-wall stove pipe consists of two layers of steel with an air gap between them. This design helps keep the outer wall cooler while maintaining higher internal flue temperatures—improving draft and reducing creosote formation.

Because the exterior stays cooler, double-wall pipe can be installed with only 6 inches of clearance to combustibles, making it ideal for tighter installations or small rooms. It’s also more energy-efficient since it retains heat in the flue gases for better performance.

Best for: Homes with limited space, higher draft needs, or frequent wood stove use.

Key Differences Between Single and Double Wall Stove Pipe: at a Glance

Which One Should You Choose?

If your installation area has ample space and good airflow, single-wall pipe offers excellent heat radiation and lower upfront cost. But if your stove sits close to a wall or you want maximum safety and performance, double-wall stove pipe is worth the investment.

No matter which you choose, remember that stove pipe is for interior connections only—once your venting passes through a wall or ceiling, you must transition to Class A chimney pipe for proper insulation and safety.

Final Thoughts

Choosing between single-wall and double-wall stove pipe depends on your home’s layout, heating goals, and clearance requirements. If you’re unsure, our certified hearth experts can help you plan a venting system that meets UL standards and local building codes.

Contact us at info@woodstovepro.com or 888-418-0005 for personalized advice and top-rated venting components from trusted brands like DuraVent, Selkirk, and Metal-Fab.