By the UK Home Forge — The British Blacksmith's Buying Guide Team · Updated June 2026 · Independent, reader-supported

Best Propane Burners for DIY Forge Builds in the UK

Building a propane forge at home is far cheaper than buying one ready-made, but the burner is the critical component that makes or breaks your success. A poorly designed burner leaves you with a smoky, inefficient forge; a good one heats steel to welding temperature reliably. The three main burner types—ribbon, forced-air, and venturi—suit different forge sizes and budgets. Understanding their strengths helps you choose wisely.

Ribbon Burners: Simplest, but Limited Heat

Ribbon burners (sometimes called slot burners) are the easiest to build from scratch. A narrow slot in a steel tube releases propane directly into the forge chamber, creating a long flame that spreads heat across the work area.

Pros:

• Dead simple to manufacture—just a steel tube with a carefully cut slot
• No moving parts or blower to fail
• Cheap to build: materials cost £20–40 if you source your own pipe and fittings
• Produces beautiful, visible flames

Cons:

• Lower heat output than forced-air or venturi designs
• Inefficient air/fuel mixing wastes gas and creates soot
• Flame pattern is hard to tune without trial and error
• Struggles to reach welding heat in larger forges (over 4 inches diameter)
• Needs careful pressure tuning—too much gas and you waste fuel, too little and combustion is incomplete

Ribbon burners work well for small decorative forges or if you're only heating small bars. They're popular with beginners because you can build one on a weekend and don't need to find a suitable blower. However, you'll find yourself frustratingly limited if you want to scale up.

Forced-Air Burners: Raw Power, but Loud

Forced-air designs use a shop compressor or dedicated blower to push air through a burner tube at high velocity. Propane is introduced downstream, mixing violently with the air jet before ignition.

Pros:

• Extremely efficient air/fuel mixing produces intense heat
• Fast heat-up times—steel reaches welding temperature in seconds, not minutes
• Adjustable blower speed lets you dial in the perfect flame
• Works reliably in large forges (8+ inches)
• Minimal soot if tuned correctly

Cons:

• Noisy—a compressor or dedicated blower runs continuously
• More complex to build: requires a blower, careful burner tube design, and needle valves
• You need a decent compressor or dedicated blower (can be £50–150)
• Flame pattern is harder to see for visual forging feedback
• Uses more gas than a well-tuned venturi, though the speed often justifies it

Most UK blacksmiths with active workshops use forced-air burners because the speed and power are genuinely useful when you're forging regularly. The noise isn't ideal for a garage, but it's manageable if you're not working at unsociable hours.

Venturi Burners: The Sweet Spot

Venturi burners (also called naturally aspirated or NA burners) use the pressure drop created by fast-moving propane to suck air into the burner tube. No blower needed—just propane pressure does the work. This is why designs like the Reil, Mongo, and T-Rex burners have become popular.

Pros:

• Silent operation—no blower noise
• Excellent air/fuel mixing without a compressor
• Efficient enough for most home forges
• Simpler than forced-air: just a burner tube, venturi section, needle valve, and regulator
• Tunable by adjusting propane pressure and needle valve position
• Lower gas consumption than forced-air once dialled in
• Parts are widely available in the UK

Cons:

• Initial tuning is fiddly—takes trial and error to get the air/fuel ratio right
• Less heat output than a well-tuned forced-air burner
• Relies on consistent propane pressure, so regulator quality matters
• Not ideal for very large forges (10+ inches) unless you use multiple burners

Why the Reil, Mongo, and T-Rex are popular:

These three designs are essentially variations on the same principle—a tapered venturi section that draws air as propane rushes through. The T-Rex (a forced-air burner despite its name) is simpler but needs a blower. The Reil and Mongo are true venturi burners; they differ mainly in tube diameter and venturi shape, but both work well. In the UK, most DIY builders favour the Reil design because detailed build guides are readily available online and the components (stainless steel tube, needle valves, brass fittings) are easily sourced from Amazon UK and specialist suppliers.

What You Actually Need

Whichever burner type you choose, you'll need:

• A needle valve to regulate propane flow (look for adjustable brass needle valves on Amazon UK, around £8–15)
• A propane regulator suitable for forge work (not a BBQ regulator—you need one rated for lower pressure outputs)
• Steel tubing (mild steel or stainless, depending on your design)
• A reliable propane supply (bottled or connected to a larger tank)

Which Should You Choose?

Go ribbon if you're building your first tiny forge and want simplicity and low cost. Accept the limitations.

Go forced-air if you have access to a decent compressor, value speed and power above all else, and don't mind the noise.

Go venturi if you want silence, reasonable efficiency, and a design that scales from a small hobby forge to something more serious. It's the most balanced choice for home blacksmiths.

For most UK DIY builders starting out, a venturi burner gives you the best trade-off between simplicity, cost, performance, and operating cost. Once you've built and tuned one, you understand how forge burners work—and upgrading later is straightforward.