Single Wall vs. Twin Wall Flue Systems: What’s the Difference?

When installing a wood burning stove, one of the most important decisions you’ll face is whether to use a single wall or twin wall flue system. Both have their uses, but understanding the difference is essential for safe, efficient operation. At Rhino Flues, we supply both single wall and twin wall systems, designed to meet every type of stove installation. Here’s what you need to know.

What is a Single Wall Flue Pipe?

Single wall flue pipes are typically made from steel and are designed to connect your stove to the chimney. They’re an affordable, straightforward option for homes that already have a suitable chimney in place. Because they don’t have insulation, single wall pipes shouldn’t pass through walls, ceilings, or combustible materials. Instead, they’re ideal for short runs directly from the stove to the chimney liner.

Single Wall Flue Pipe

What is a Twin Wall Flue System?

Twin wall flue systems are made with two layers of stainless steel and an insulating layer in between. This insulation keeps the outer surface cooler while maintaining a high flue temperature inside, which improves draft and prevents condensation. Twin wall flues can be used where no chimney exists, such as conservatories, extensions, or new builds. They can run externally along a wall or vertically through the roof, giving you maximum flexibility.

Twin Wall Flue Pipe

Safety Considerations

Safety is a key difference between the two. Single wall flues should never be used in areas where they could pose a fire risk, while twin wall systems are specifically designed to pass safely through roofs, walls, and other parts of the house. Building regulations in the UK often require twin wall pipes for new installations without a chimney.

Cost and Installation

Single wall pipes are cheaper and easier to install but have limited applications. Twin wall systems are more expensive but offer far greater flexibility and long-term safety. At Rhino Flues, we provide high-quality systems that are designed for easy installation and long-term performance.

Conclusion

When deciding between single wall and twin wall flues, the choice depends on your home setup. If you already have a functioning chimney, single wall flues are often sufficient. If not, a twin wall system is the safest and most versatile option. Rhino Flues offers a wide range of both, ensuring your stove operates safely, efficiently, and in compliance with building regulations.